(4/5) of the number A is equivalent to (3/4) of the number B, the number A is 30, what is the number B.
甲数的(4/5)相当于乙数的(3/4)，甲数是30，乙数是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(4/5) / (3/4)</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">30 * (16/15)</gadget>
<output>32</output>

<result>32</result>