There are 12 boys in a team. The teacher asks a girl to be placed between every two boys. How many girls are there in total?
一队有12个男生，老师让每两个男生之间排进一个女生，排进的女生一共有多少个？
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">1 * 11</gadget>
<output>11</output>

<result>11</result>