40% of the number A is equal to 50% of the number B, and the number A is the number of B.
甲数的40%与乙数的50%相等，甲数是乙数的多少．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>