Jingjing has 2 tops, 2 skirts and 1 pair of trousers. To make a suit, how many different matching methods are there?
静静有2件上衣，2条裙子和1条裤子，要配成一套衣服，共有多少重不同的搭配方法．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<result>6</result>