Try to add a pair of parentheses to the formula 4*2+12/2, what is the maximum calculation result.
试着在算式4*2+12/2中添加一对括号，所得计算结果最大是多少．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">2 + 6</gadget>
<output>8</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>