It takes 856cm**2 to make a cylindrical iron box. If 162cm**2 is used for a bottom surface, how many square centimeters of material do you need to make a side?
制作一个圆柱形铁盒需用料856cm**2，如果一个底面用去162cm**2，做一个侧面需用料多少平方厘米？
<gadget id="calculator">162 * 2</gadget>
<output>324</output>

<gadget id="calculator">856 - 324</gadget>
<output>532</output>

<result>532</result>