When a number is added, subtracted, and divided by itself, the result of adding the sum, difference, and quotient is 22.4. What is this number?
一个数与它自己相加、相减、相除，其和、差、商相加的结果是22.4，这个数是多少．
<gadget id="calculator">22.4 - 1</gadget>
<output>21.4</output>

<gadget id="calculator">21.4 / 2</gadget>
<output>10.7</output>

<result>10.7</result>