The sum of a number and 6.28 is divided by 3.2, the quotient is 2.2, find this number.
一个数与6.28的和除以3.2，商是2.2，求这个数．
<gadget id="calculator">2.2 * 3.2</gadget>
<output>7.04</output>

<gadget id="calculator">7.04 - 6.28</gadget>
<output>0.76</output>

<result>0.76</result>