A belongs to B (8/5), the number of B is 25, what is the number of A.
甲是乙的(8/5)，乙数是25，甲数是多少．
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">25 * (8/5)</gadget>
<output>40</output>

<result>40</result>