t = int(input())

def func(x, d):
    q, r = divmod(x, d-1)
    ans = q*(d-1)*d//2
    ans += r*(r+1)//2
    return ans

for _ in range(t):
    d, a, b = map(int, input().split())
    print(func(b, d)-func(a-1, d))