The number 0.6 more than (3/5) of a number is 12.6, find this number.
比一个数的(3/5)多0.6的数是12.6，求这个数．
<gadget id="calculator">12.6 - 0.6</gadget>
<output>12</output>

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

<gadget id="calculator">12 / (3/5)</gadget>
<output>20</output>

<result>20</result>