8 times a number minus 3.2 is 16, find this number. (solution by equation)
一个数的8倍减去3.2得16，求这个数．(用方程解)
<gadget id="calculator">16 + 3.2</gadget>
<output>19.2</output>

<gadget id="calculator">19.2 / 8</gadget>
<output>2.4</output>

<result>2.4</result>