Number A is 9, which is (3/4) of Number B. What is the number of B?
甲数是9，是乙数的(3/4)，乙数是多少．
<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>