If the lateral area of a cylinder is 314 square centimeters and its volume is 314 cubic centimeters, what is the area of its base in square centimeters?
一个圆柱的侧面积是314平方厘米，体积是314立方厘米，它的底面积是多少平方厘米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>