The ratio of a ratio is (3/5), if the former term of this ratio is 9, then what is the latter term.
一个比的比值是(3/5)，如果这个比的前项是9，那么后项是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">9 / (3/5)</gadget>
<output>15</output>

<result>15</result>