How many draws are there for 5 students to draw 2 students for a competition?
5名同学抽两名同学去竞赛有多少抽法．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>