The circumference of the base of a cylinder is 62.8 cm, what is the area of its base in square centimeters?
一个圆桶的底面周长是62.8厘米，它的底面面积是多少平方厘米？
<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>