import sys
input = sys.stdin.readline

def calc(k):
    x2=x-k*y
    y2=y+k*x

    if 0<=x2<=D and 0<=y2<=D:
        return abs(x*y2-y*x2)
    return 0

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

    ANS=0

    for i in range(x//y-3,x//y+3):
        ANS=max(ANS,calc(i))

    for i in range((D-y)//x-3,(D-y)//x+3):
        ANS=max(ANS,calc(i))

    for i in range((x-D+y-1)//y-3,(x-D+y-1)//y+3):
        ANS=max(ANS,calc(i))

    for i in range((-y+x-1)//x-3,(-y+x-1)//x+3):
        ANS=max(ANS,calc(i))


    print(ANS)