T=int(input())
import math
for i in range(T):
  D,x,y=map(int, input().split())
  if x*y==0:
    print(0)
  else:
    if x<y:
      x,y=y,x 
    cc=math.gcd(x,y)
    xx,yy=x//cc,y//cc  
    c=min(x//yy,(D-y)//xx)
    
    px,py=x-yy*c,y+xx*c 
    if x==px and y==py:
      print(0)
    else:
      s=abs(x*py-y*px)
      print(s)