The circumference of a cylindrical base is 3.25dm, and the height is 1.6cm. Find its lateral area.
一个圆柱底面周长是3.25dm，高是1.6cm，求它的侧面积．
<gadget id="calculator">3.25 * 10</gadget>
<output>32.5</output>

<gadget id="calculator">32.5 * 1.6</gadget>
<output>52</output>

<result>52</result>