The circumference of the base of the cylinder is 18.84m and the height is 3.5m. Find the lateral area of the cylinder.
圆柱的底面周长是18.84m，高是3.5m．求圆柱的侧面积．
<gadget id="calculator">18.84 * 3.5</gadget>
<output>65.94</output>

<result>65.94</result>