Lingling has 5 different hats, 3 different tops and 2 different pairs of trousers. How many different ways are there to choose a hat, a top and a pair of trousers to make a set?
玲玲有5顶不同的帽子，3件不同的上衣和2条不同的裤子，从中选一顶帽子，一件上衣和一条裤子配成一套，有多少种不同的方法？
<gadget id="calculator">3 * 2 * 5</gadget>
<output>30</output>

<result>30</result>