For a ratio, the preceding term is 9, the ratio is (3/4), what is the latter term of the ratio.
一个比，它的前项是9，比值是(3/4)，比的后项是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">9 / (3/4)</gadget>
<output>12</output>

<result>12</result>