The number that is 4 more than 80% of a number is 22.4. Find this number?
比一个数的80%多4的数是22.4，求这个数？
<gadget id="calculator">22.4 - 4</gadget>
<output>18.4</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">18.4 / (4/5)</gadget>
<output>23</output>

<result>23</result>