The school sunshine partner running sports team wants to buy a set of sportswear for the players. Now there are 3 pieces of tops and 4 pairs of shorts to choose from. How many different purchasing methods can there be?
学校阳光伙伴跑运动队要为队员们购买一套运动服，现在有3件上衣和4条短裤可以选择，这样一共可以有多少种不同的购买方法．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>