Problem:
Rectangle

Write a program which calculates the area and perimeter of a given rectangle.

Input

The length a and breadth b of the rectangle are given in a line separated by a single space.

Output

Print the area and perimeter of the rectangle in a line. The two integers should be separated by a single space.

Constraints

1 ≤ a, b ≤ 100

Sample Input 1

3 5

Sample Output 1

15 16

Solution in Ruby (judge verdict: Accepted)

def calc_area(x,y)
   area=x*y
end

def calc_length(x,y)
   length=x+x+y+y
end

x,y=gets.split
a=x.to_i
b=y.to_i
if a.between?(1,100)==false then
   puts"Please input [1<= a,b <=100]"
   exit
end

if b.between?(1,100)==false then
   puts"Please input [1<= a,b <=100]"
   exit
end

area=calc_area(a,b)
length=calc_length(a,b)

printf("%d %d\n",area,length)