def g(N):
    if N==0:
        return 0

    if N%(D-1)==0:
        Q=N//(D-1)
        R=0
    else:
        Q=N//(D-1)+1
        R=D-1-N%(D-1)

    return Q*(D*(D-1))//2-D*R+(R*(R+1))//2

T=int(input())
X=[0]*T
for k in range(T):
    D,A,B=map(int,input().split())
    X[k]=g(B)-g(max(A-1,0))
print("\n".join(map(str,X)))