Yaya has 3 jackets and 5 pairs of trousers. How many different ways does Honghong wear clothes?
丫丫有3件上衣和5条裤子，红红在穿衣服时有多少种不同的穿法．
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>