The little cleverness measures the distance from the top to the bottom of a cylindrical wooden pile is 50 cm, and the diameter of the top is 10 cm. What is the side area of the wooden pile in square centimeters?
小机灵量得一个圆柱形木桩的上面到下面的距离是50厘米，上面的直径是10厘米，这个木桩的侧面积是多少平方厘米．
<gadget id="calculator">3.14 * 10 * 50</gadget>
<output>1_570</output>

<result>1_570</result>