A's number (2/5) is B's (5/6), B's number is 24, what is A's number?
甲数的(2/5)是乙数的(5/6)，乙数是24，甲数是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">(5/6) / (2/5)</gadget>
<output>25/12 = around 2.083333</output>

<gadget id="calculator">24 * (25/12)</gadget>
<output>50</output>

<result>50</result>