T = int(input())

def calc(x,a):
    low = 1
    high = a
    while low + 2 < high:
        b = (low * 2 + high) // 3
        c = (low + high * 2) // 3
        if f(b,x,a) < f(c,x,a):
            high = c
        else:
            low = b
    ans = 10 ** 30
    for i in range(low,high + 1):
        if f(i,x,a) < ans:
            ans = f(i,x,a)
    return ans

def f(n,x,a):
    q = a // n
    r = a % n
    ans = n * x + (q + 1) ** 2 * r + q ** 2 * (n - r)
    return ans

for _ in range(T):
    x,a = map(int,input().split())
    print(calc(x,a))