def gojohou(a, b):
    x1, x2 = int(a), int(b)
    if x1 < x2:
        tmp = x1
        x1 = x2
        x2 = tmp
    if x2 == 0:
        return x1
    while x2 != 0:
        tmp = x2
        x2 = x1 % x2
        x1 = tmp
    return x1


def naname(wid, hei):
    if gojohou(wid, hei) == 1:
        if (wid == 0)or(hei == 0):
            return 1
        else:
            return 2
    return 0


def count(WMAX, HMAX):
    ans = 0
    for a in range(WMAX):
        for b in range(HMAX):
            x = WMAX - a
            y = HMAX - b
            ans += naname(a, b) * x * y
    return ans


while True:
    xy = input().split()
    z = count(int(xy[0]), int(xy[1])) % (1000000000 + 7)
    print(z)