Multiply two non-zero numbers, expand one factor by 3 times, and reduce the other factor to its (1/2), how many times the product is expanded
两个不为零的数相乘，把一个因数扩大3倍，另-个因数缩小到它的(1/2)，积扩大多少倍
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 * (1/2)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>