In 8:15, if 4 is added to the former term, how much should the latter term be multiplied to keep the ratio unchanged?
在8：15中，如果前项加上4，要使比值不变，后项应乘以多少
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

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