Xiao Ming has 3 jackets and 4 pairs of pants, and wears one set of clothes every day. How many different ways does he wear them?
小明有3件上衣和4条裤子，每天穿一套衣服，他共有多少种不同的穿法？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>