root = [(a, b, c, d, e, f, g, h, i) for a in range(1, 10) for b in range(1, 10) for c in range(1, 10) for d in range(1, 10) for e in range(1, 10) for f in range(1, 10) for g in range(1, 10) for h in range(1, 10) for i in range(1, 10) if a + 13 * b / c + d + 12 * e - f - 11 + g * h / i - 10 == 66] print(len(root))