It is known that the circumference of the base of the cylinder is 62.8 meters and the height is 5 meters, so what is the side area of the cylinder?
已知圆柱的底面周长是62.8米，高是5米，那么圆柱的侧面积是多少？
<gadget id="calculator">62.8 * 5</gadget>
<output>314</output>

<result>314</result>