#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, double);
int /*<<< orphan*/ scanf(char *, int *, ...);
int main() {
  int test;
  scanf("%d", &test);
  while (test--) {
    int s, v;
    double time = 0;
    scanf("%d %d", &s, &v);
    double sf = s, vf = v;
    time = 0.666666 * (sf / vf);
    printf("%f\n", time);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xed5(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x8(%rbp)
cmp    $0x0,%eax
je     11b8 <main+0x98>
xorps  %xmm0,%xmm0
movsd  %xmm0,-0x18(%rbp)
lea    0xea4(%rip),%rdi
lea    -0xc(%rbp),%rsi
lea    -0x10(%rbp),%rdx
mov    $0x0,%al
call   1040 <scanf@plt>
cvtsi2sdl -0xc(%rbp),%xmm0
movsd  %xmm0,-0x20(%rbp)
cvtsi2sdl -0x10(%rbp),%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  -0x20(%rbp),%xmm1
divsd  -0x28(%rbp),%xmm1
movsd  0xe67(%rip),%xmm0
mulsd  %xmm1,%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x18(%rbp),%xmm0
lea    0xe60(%rip),%rdi
call   1030 <printf@plt>
jmp    1141 <main+0x21>
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x18,%rsp
lea    0xed9(%rip),%rdi
lea    0xc(%rsp),%rsi
xor    %eax,%eax
call   1040 <scanf@plt>
subl   $0x1,0xc(%rsp)
jb     119d <main+0x7d>
lea    0xebc(%rip),%r14
lea    0x14(%rsp),%r15
lea    0x10(%rsp),%r12
lea    0xeb1(%rip),%rbx
nopl   (%rax)
mov    %r14,%rdi
mov    %r15,%rsi
mov    %r12,%rdx
xor    %eax,%eax
call   1040 <scanf@plt>
xorps  %xmm0,%xmm0
cvtsi2sdl 0x14(%rsp),%xmm0
xorps  %xmm1,%xmm1
cvtsi2sdl 0x10(%rsp),%xmm1
divsd  %xmm1,%xmm0
mulsd  0xe72(%rip),%xmm0
mov    %rbx,%rdi
call   1030 <printf@plt>
subl   $0x1,0xc(%rsp)
jae    1160 <main+0x40>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [4 x i8] c"%f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca double
%6 = alloca double
%7 = alloca double
store i32 0, i32* %1
%8 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
br label %9
9: ; preds = %13, %0
%10 = load i32, i32* %2
%11 = add nsw i32 %10, -1
store i32 %11, i32* %2
%12 = icmp ne i32 %10, 0
br i1 %12, label %13, label %25
13: ; preds = %9
store double 0.000000e+00, double* %5
%14 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %3, i32* %4)
%15 = load i32, i32* %3
%16 = sitofp i32 %15 to double
store double %16, double* %6
%17 = load i32, i32* %4
%18 = sitofp i32 %17 to double
store double %18, double* %7
%19 = load double, double* %6
%20 = load double, double* %7
%21 = fdiv double %19, %20
%22 = fmul double 0x3FE55553EF6B5D46, %21
store double %22, double* %5
%23 = load double, double* %5
%24 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), double %23)
br label %9
25: ; preds = %9
%26 = load i32, i32* %1
ret i32 %26
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [4 x i8] c"%f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = bitcast i32* %1 to i8*
%5 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = add nsw i32 %6, -1
store i32 %7, i32* %1
%8 = icmp eq i32 %6, 0
br i1 %8, label %24, label %9
9: ; preds = %0
%10 = bitcast i32* %2 to i8*
%11 = bitcast i32* %3 to i8*
br label %12
12: ; preds = %9, %12
%13 = call i32 (i8*, i32*, ...) @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%14 = load i32, i32* %2
%15 = sitofp i32 %14 to double
%16 = load i32, i32* %3
%17 = sitofp i32 %16 to double
%18 = fdiv double %15, %17
%19 = fmul double %18, 0x3FE55553EF6B5D46
%20 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), double %19)
%21 = load i32, i32* %1
%22 = add nsw i32 %21, -1
store i32 %22, i32* %1
%23 = icmp eq i32 %21, 0
br i1 %23, label %24, label %12
24: ; preds = %12, %0
ret i32 0
}