A number is more than 8 (1/2) 3.2. Find this number. (Solution of column equation)
一个数比8的(1/2)多3.2．求这个数．(列方程解)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 * (1/2)</gadget>
<output>4</output>

<gadget id="calculator">3.2 + 4</gadget>
<output>7.2</output>

<result>7.2</result>