Xiaohong currently has 2 tops, 2 skirts and 1 pair of trousers. How many different matching methods are there to make a set of clothes?
小红现有2件上衣，2条裙子和1条裤子，要配成一套衣服，有多少种不同的搭配方法．
<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>