There are 5 math teachers in the third grade, how many calls can be made for every two teachers?
三年级有5位数学老师，每两个人通一次电话，可以通多少次电话？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">4 * (5/2)</gadget>
<output>10</output>

<result>10</result>