It is known that the side of a cylindrical oil storage tank is expanded into a square with a side length of 62.8 meters. What is the floor area of this oil storage tank in square meters?
已知一个圆柱体储油罐的侧面展开后是一个边长是62.8米的正方形，这个储油罐的占地面积是多少平方米．
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">3.14 * 10 * 10</gadget>
<output>314</output>

<result>314</result>