The lateral area of a cylinder is expanded to obtain a square. The height of the cylinder is 62.8cm. What is the area of the base in cm**2.
一个圆柱的侧面积展开得到一个正方形，圆柱高是62.8cm，底面积是多少cm**2．
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>