The number of balls contained in a small box is (1/2) that of a large box, then the number of balls contained in 4 large boxes is equal to the number of balls in the small boxes.
一个小盒子里装的球数是一个大盒子的(1/2)，则4个大盒子装的球数等于多少个小盒子的球数．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>