Xiaohua bought 3 different pairs of trousers, 5 different tops and 2 different pairs of shoes, how many different matching ways does he have?
小华买了3条不同的裤子，5件不同的上衣和2双不同的鞋，他一共有多少种不同的搭配方式．
<gadget id="calculator">3 * 5 * 2</gadget>
<output>30</output>

<result>30</result>