n=int(input())
for i in range(n):
    a,b,c=map(float,input().split())
    print(f"${a*b*c:.2f}")
90767112bac62a4b167f042c91d32c888133196a
<mask token>

<mask token>
for i in range(n):
    a, b, c = map(float, input().split())
    print(f'${a * b * c:.2f}')

n = int(input())
for i in range(n):
    a, b, c = map(float, input().split())
    print(f'${a * b * c:.2f}')

n=int(input())
for i in range(n):
    a,b,c=map(float,input().split())
    print(f"${a*b*c:.2f}")