import sys
input = sys.stdin.readline

T=int(input())

for tests in range(T):
    D,x,y=map(int,input().split())

    if x==0:
        print(y*D)
        continue
    if y==0:
        print(x*D)
        continue

    # (z,w) = (x,y) + k(-y,x)

    # 0<=x-ky<=D
    # 0<=y+kx<=D

    # k<=x/y,k<=(D-y)/x,k>=(x-D)/y,k>=-y/x

    MAX=min(x//y,(D-y)//x)
    MIN=max((x-D+y-1)//y,(-y+x-1)//x)

    A1=abs(x*(y+MIN*x)-y*(x-MIN*y))
    A2=abs(x*(y+MAX*x)-y*(x-MAX*y))

    print(max(A1,A2))