Xiaoli has 6 coats and 3 trousers. She wants to choose a suit to participate in the competition. How many different choices are there?
小丽有6件上衣，3件裤子，她要选择一套衣服去参加比赛，一共有多少种不同的选法．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>