30% of a number minus 9.5 equals 7.3, find this number. (solution by equation)
一个数的30%减去9.5等于7.3，求这个数．(用方程解)
<gadget id="calculator">7.3 + 9.5</gadget>
<output>16.8</output>

<gadget id="calculator">16.8 / 0.3</gadget>
<output>56</output>

<result>56</result>