Kabir Singh is playing a game on the non-negative side of  x-axis. It takes him $1 second$ to reach from Pth position to (P−1)th position or (P+1)th position. 
Kabir never goes to the negative side and also doesn't stop at any moment of time.
The movement can be defined as  : 
- At the beginning he is at $x=0$ , at time $0$
- During the first round, he moves towards $x=1$ and comes back to the $x=0$ position.
- In the second round, he moves towards the $x=2$ and comes back again to $x=0$.
- So , at $Kth$ round , he moves to $x=K$ and comes back to $x=0$
So in this way game goes ahead.
For Example, the path of Kabir for $3rd$ round is given below.
$0−1−2−3−2−1−0$
The overall path followed by Kabir would look somewhat like this:
$0−1−0−1−2−1−0−1−2−3−2−1−0−1−2−3−4−3−…$
Now the task is , You are given Two Non-Negative integers $N$ , $K$ .
You have to tell the time at which Kabir arrives at $x=N$ for the $Kth$ time.
Note - Kabir visits all the points , he can not skip or jump over one point.

-----Input:-----
- First line will contain $T$, number of testcases. Then the testcases follow. 
- Each testcase contains of a single line of input, two integers $N, K$. 

-----Output:-----
For each testcase, output in a single line answer i.e Time Taken by Kabir Singh modulo 1000000007.

-----Constraints-----
- $1 \leq T \leq 10^5$
- $0 \leq N \leq 10^9$
- $1 \leq K \leq 10^9$

-----Sample Input:-----
4

0 1
1 1
1 3
4 6

-----Sample Output:-----
0
1
5
46

-----EXPLANATION:-----
Test Case 1:
Kabir starts the journey from the $N=0$ at time $t=0$ and it's the first time$ (K=1)$, he is here. So, the answer is $0$.
Test Case 3:
The path followed by Kabir to reach 1 for the third time is given below.
$0−1−0−1−2−1$
He reaches $1$ for the third time at $ t=5$.

Source: codechef | Difficulty: UNKNOWN_DIFFICULTY


Solutions:
T = int(input())
MOD = int(1000000000.0 + 7)
for t in range(T):
	(N, K) = [int(a) for a in input().split()]
	M = K // 2
	ans = (N + M) * (N + M) - M
	if K % 2:
		ans += 2 * M
	if N == 0:
		ans = K * (K - 1)
	print(ans % MOD)


t = int(input())
for _ in range(t):
	(n, k) = list(map(int, input().split()))
	M = 1000000007
	if n == 0:
		m = k - 1
		total = m * (m + 1)
		print(total % M)
	elif k % 2 == 0:
		m = (k - 2) // 2 + n
		total = m * (m + 1) + n
		print(total % M)
	else:
		m = k // 2 + n
		total = m * (m + 1) - n
		print(total % M)


mod = 10 ** 9 + 7
for t in range(int(input())):
	(n, k) = map(int, input().split())
	if n == 0:
		if k == 1:
			print(0)
		else:
			print(int(k * (1 + k) / 2) % mod)
		continue
	futile_moves = n - 1
	if k == 1:
		f_time = futile_moves * (1 + futile_moves)
		print((f_time + n) % mod)
		continue
	k -= 1
	futile_moves += 1
	if k % 2 == 0:
		futile_moves += int(k / 2) - 1
	else:
		futile_moves += int(k / 2)
	f_time = futile_moves * (1 + futile_moves)
	if k % 2 == 0:
		f_time += (futile_moves + 1) * 2 - n
	else:
		f_time += n
	f_time %= mod
	print(f_time)


def solve(n, k):
	ans = 0
	if n == 0:
		if k == 1:
			return 0
		else:
			return (k - 1) * k % (10 ** 9 + 7)
	if k == 1:
		return n * n % (10 ** 9 + 7)
	if k % 2 == 0:
		ans = n * n + n * k + int(int((k - 1) / 2) * int((k - 1) / 2 + 1))
	if k % 2 != 0:
		ans = n * n + 2 * n * max(0, int((k - 1) / 2)) + int(int((k - 1) / 2) * int((k - 1) / 2 + 1))
	return ans % (10 ** 9 + 7)
t = int(input())
for i in range(t):
	(n, k) = map(int, input().split())
	print(solve(n, k))


mod = 10 ** 9 + 7
for k in range(int(input())):
	(num, times) = map(int, input().split())
	if num == 0:
		x = times - 1
		ans = (x % mod * (x % mod) % mod + x % mod) % mod
	elif times % 2 == 0:
		x = num + (times - 1) // 2
		ans = (x % mod * (x + 1) % mod + x % mod + num % mod - x % mod) % mod
	else:
		x = num + (times - 1) // 2
		ans = (x % mod * (x + 1) % mod + x % mod - num % mod - x % mod) % mod
	print(ans)


import math
mod = 1000000007
T = int(input())
for _ in range(T):
	(n, m) = list(map(int, input().split()))
	if n == 0:
		print(m * (m - 1) % mod)
	elif m == 1:
		print((n * (n - 1) + n) % mod)
	else:
		val = n - 1 + math.ceil((m - 1) / 2)
		fv = val * (val + 1) % mod
		if (m - 1) % 2 == 0:
			fv = (fv + 2 * (val + 1) - n) % mod
		else:
			fv = (fv + n) % mod
		print(fv % mod)


mod = 10 ** 9 + 7
for _ in range(int(input())):
	(n, k) = map(int, input().split())
	if n == 0:
		print(k * (k - 1))
	else:
		ans = 0
		tmp = k // 2
		if k & 1:
			ans += k - 1
		ans += (n + tmp) * (n + tmp) - tmp
		print(ans % mod)


for _ in range(int(input())):
	(n, k) = map(int, input().split())
	if n == 0:
		print(k * (k - 1) % 1000000007)
		continue
	x = int((k - k % 2) / 2)
	ans = (n + x - 1) * (n + x) + n + 2 * (k % 2) * x
	print(ans % 1000000007)


t = int(input())
for _ in range(t):
	[n, k] = [int(x) for x in input().split()]
	if n == 0:
		print((k - 1) * k % 1000000007)
		continue
	if k % 2 == 0:
		x = int(k / 2) - 1
		print(((n + x) * (n + x + 1) + n) % 1000000007)
	else:
		x = int((k - 3) / 2)
		print(((n + x) * (n + x + 1) + n + 2 * x + 2) % 1000000007)


import math
MOD = 1000000007
T = int(input())
for t in range(T):
	(i, N) = list(map(int, input().split()))
	if i == 0:
		N = N * 2
	tmp = math.floor(N / 2)
	tmp2 = math.floor((N - 1) / 2)
	ans = i * i % MOD + tmp * 2 * i % MOD + tmp2 * (tmp2 + 1) % MOD
	print(ans % MOD)


t = int(input())
for _ in range(0, t):
	(n, k) = map(int, input().split())
	if n != 0:
		fn = n + k // 2
		if k % 2 == 0:
			print((fn ** 2 - fn + n) % 1000000007)
		else:
			print((fn ** 2 + fn - n) % 1000000007)
	else:
		print(k * (k - 1) % 1000000007)


import math
from sys import stdin, stdout
from math import gcd, sqrt, ceil, floor, inf
from copy import deepcopy
ii1 = lambda : int(stdin.readline().strip())
is1 = lambda : stdin.readline().strip()
iia = lambda : list(map(int, stdin.readline().strip().split()))
isa = lambda : stdin.readline().strip().split()
mod = 1000000007
for _ in range(ii1()):
	(n, k) = iia()
	new = k - 1
	if n == 0:
		if k == 1:
			ans = 0
		else:
			ans = (k - 1) * k
	elif k == 1:
		ans = n * (n + 1) - n
	elif k % 2 == 0:
		ans = (n + new // 2) * (n + new // 2 + 1) + n
	else:
		ans = (n + new // 2) * (n + new // 2 + 1) - n
	print(ans % mod)


t = int(input())
for i in range(t):
	(n, k) = [int(x) for x in input().split()]
	if n == 0:
		ans = (k - 1) * k
		print(ans % 1000000007)
		continue
	k -= 1
	if k == 0:
		ans = n * (n - 1) + n
		print(ans % 1000000007)
	elif k % 2 != 0:
		p = n + k // 2
		ans = p * (p + 1) + n
		print(ans % 1000000007)
	else:
		k -= 2
		p = n + k // 2
		ans = p * (p + 1) + (p + 1) + (p + 1 - n)
		print(ans % 1000000007)


t = int(input())
mod = 10 ** 9 + 7
for _ in range(t):
	(n, k) = list(map(int, input().split()))
	if n == 0:
		k -= 1
		print(k ** 2 + k)
		continue
	if k == 1:
		l = n - 1
		nz = l ** 2 + l
		print(nz + n)
		continue
	rem = k % 2
	up = k // 2
	l = up + n - 1
	nz = l ** 2 + l
	if rem == 0:
		ans = nz + n
		print(ans % mod)
	else:
		ans = nz + 2 * l + 2 - n
		print(ans % mod)


test = int(input())
for _ in range(test):
	(n, k) = map(int, input().split())
	ans = pow(n, 2, 1000000007)
	k = k - 1
	i = 0
	while k != 0:
		ans += 2 * n % 1000000007
		if n != 0:
			k -= 1
		if k == 0:
			break
		ans += (i + 2) % 1000000007
		k -= 1
		i = i + 2
	print(ans % 1000000007)


ipnl = lambda n: [int(input()) for _ in range(n)]
inp = lambda : int(input())
ip = lambda : [int(w) for w in input().split()]
M = 10 ** 9 + 7
for _ in range(inp()):
	(n, k) = ip()
	if n == 0:
		t = k * (k - 1)
		print(t % M)
		continue
	if k == 1:
		print(n * n)
		continue
	kk = k // 2
	t = (n + kk) * (n + kk)
	if k % 2:
		t += kk
	else:
		t -= kk
	print(t % M)


import sys
from random import choice, randint
inp = sys.stdin.readline
out = sys.stdout.write
flsh = sys.stdout.flush
sys.setrecursionlimit(10 ** 9)
inf = 10 ** 20
eps = 1.0 / 10 ** 10
mod = 10 ** 9 + 7
dd = [(-1, 0), (0, 1), (1, 0), (0, -1)]
ddn = [(-1, 0), (-1, 1), (0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1)]

def MI():
	return map(int, inp().strip().split())

def LI():
	return list(map(int, inp().strip().split()))

def LLI():
	return [list(map(int, l.split())) for l in sys.stdin.readlines().strip()]

def LI_():
	return [int(x) - 1 for x in inp().strip().split()]

def LF():
	return [float(x) for x in inp().strip().split()]

def LS():
	return inp().strip().split()

def I():
	return int(inp().strip())

def F():
	return float(inp().strip())

def S():
	return inp().strip()

def pf(s):
	return out(s + '\n')

def JA(a, sep):
	return sep.join(map(str, a))

def JAA(a, s, t):
	return s.join((t.join(map(str, b)) for b in a))

def main():
	from math import ceil
	t = I()
	l = []
	for _ in range(t):
		(n, k) = MI()
		if n == 0:
			k -= 1
			ans = k * (k + 1) % mod
			l.append(ans)
		elif k % 2 != 0:
			lr = k // 2
			l.append((n * n % mod + lr * (2 * n % mod) % mod + lr * (lr + 1) % mod) % mod)
		else:
			lr = k // 2
			l.append((n * n % mod + lr * (2 * n) % mod % mod + lr * (lr - 1) % mod) % mod)
	for i in range(t):
		pf(str(l[i]))

def __starting_point():
	main()
__starting_point()


MOD = 10 ** 9 + 7
for lo in range(int(input())):
	(n, k) = list(map(int, input().split()))
	if n == 0:
		print(k * (k - 1) % MOD)
		continue
	c = k // 2
	x = 1
	if k % 2 == 0:
		x = 0
	y = c + x + n
	if x == 0:
		ans = y * (y - 1) + n
	else:
		ans = y * (y - 1) - n
	print(ans % MOD)


import math
t = int(input())
while t > 0:
	k = input()
	if len(k) == 0:
		continue
	(n, k) = k.split()
	n = int(n)
	k = int(k)
	if n == 0 and k == 1:
		print('0')
		t -= 1
		continue
	elif n == 0:
		print(k * (k - 1) % 1000000007)
		t -= 1
		continue
	level = n + math.ceil((k + 1) / 2)
	time = (level - 1) * (level - 2)
	if k % 2 == 0:
		time = time + n
	else:
		time = time + 2 * (level - 1) - n
	print(time % 1000000007)
	t -= 1


T = int(input())
mod = 1000000007
for _ in range(T):
	(n, k) = list(map(int, input().split()))
	if n == 0:
		k -= 1
		print(k * (k + 1) % mod)
	elif k == 1:
		print(n ** 2 % mod)
	else:
		if k % 2 == 0:
			a = k // 2
			b = a - 1
			ans = n ** 2 % mod + a * (2 * n % mod) % mod + b * (b + 1) % mod
		else:
			k -= 1
			a = k // 2
			b = a
			ans = n ** 2 % mod + a * (2 * n % mod) % mod + b * (b + 1) % mod
		print(ans % mod)