There are 12 people in the mathematics interest group, and boys account for 2/3 of the total number. How many boys are there?
数学兴趣小组有12人，男生占总人数的(2/3)，男生有多少人．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 * (2/3)</gadget>
<output>8</output>

<result>8</result>