The former term of the ratio is 3, the ratio is (1/5), and what is the latter term
比的前项是3，比值是(1/5)，后项是多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / (1/5)</gadget>
<output>15</output>

<result>15</result>