rectangle is surrounded by a 32-meter-long iron wire. If the width is 6m, what is the area?
用一根长32米长的铁丝围成长方形，如宽是6m，那么面积是多少．
<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 - 6</gadget>
<output>10</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<result>60</result>