Add 5.6 to 8 times a number to get 30.8, find this number.
一个数的8倍加5.6得30.8，求这个数．
<gadget id="calculator">30.8 - 5.6</gadget>
<output>25.2</output>

<gadget id="calculator">25.2 / 8</gadget>
<output>3.15</output>

<result>3.15</result>