The former term of the ratio is expanded to 6 times the original, and the latter term is reduced to the original (1/3), the ratio is expanded to how many times the original
比的前项扩大为原来的6倍，后项缩小为原来的(1/3)，比值就扩大为原来的多少倍
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>