Xiaolan has 2 pairs of pants with different designs and 3 tops with different colors. How many different collocations does she have to wear?
小兰有2条花色不同的裤子，3件颜色不同的上衣．她一共有多少种不同的搭配穿法．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>