The lateral area of a cylinder is 62.8cm**2, and the height is 4cm. What is the radius of the base of the cylinder in centimeters?
一个圆柱的侧面积是62.8cm**2，高是4cm，这个圆柱的底面半径是多少厘米．
<gadget id="calculator">62.8 / 4 / 3.14 / 2</gadget>
<output>2.5</output>

<result>2.5</result>