(2/5) of number A is equal to (3/4) of number B. If the number B is 16, what is the number A?
甲数的(2/5)等于乙数的(3/4)．如果乙数是16，那么甲数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) / (2/5)</gadget>
<output>15/8 = around 1.875</output>

<gadget id="calculator">16 * (15/8)</gadget>
<output>30</output>

<result>30</result>