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