Xiaoli has 4 different tops and 3 different pants. If the tops and pants are worn together, how many different ways can they be worn?
小丽有4件不同的上衣和3条不同的裤子，若上衣和裤子搭配着穿，一共有多少种不同的穿法．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>