from tools import number_theory

def multi():
    numerator, denominator = 1, 1
    for a in range(1, 10):
        for b in range(1, 10):
            if a != b:
                if not ((10 * a * b) % (9 * a + b)):
                    c = 10 * a * b // (9 * a + b)
                    numerator *= 10 * a + b
                    denominator *= 10 * b + c
    return denominator // number_theory.gcd(numerator, denominator)

print(multi())