3，　　采用尽可能少的电路，求出两个在100以内的正整数的最大公约数和最小公倍数。（不许采用mod函数），仿真并综合出电路-3, the circuit using as little as possible, find two positive integers less than the 100 greatest common divisor and least common multiple. (Not allowed to use mod function), and integrated a circuit simulation