The former term of a ratio is divided by 5, and the latter term is multiplied by 5, the ratio is reduced to the original value
一个比的前项除以5，后项乘以5，比值是缩小到原来的多少
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>