(4/5) of number A is equal to (3/4) of number B. Number B is 24. What is the number of A?
甲数的(4/5)与乙数的(3/4)相等，乙数是24，甲数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(3/4) / (4/5)</gadget>
<output>15/16 = around 0.9375</output>

<gadget id="calculator">24 * (15/16)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>