The number 10 more than (3/5) of a number is 40. Find this number.
比一个数的(3/5)多10的数是40，求这个数．
<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>