The teacher has to choose one of 4 girls and 3 boys to be the host of the show. How many different choices are there?
老师要从4名女生、3名男生中各选一人担任节目主持人，共有多少种不同的选择方案．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>