Xiaohong has 3 different tops, 3 different skirts, how many different ways of dressing and matching.
小红有3件不同的上衣，3件不同的裙子，共有多少种不同的穿衣搭配方法．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>