(5/8) of a number is 15, how much is this number equivalent to 40.
一个数的(5/8)是15，这个数相当于40的多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">15 / (5/8) / 40</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>