Expanding the sides of a cylinder is a square with a side length of 6.28 cm. What is the volume of this cylinder?
将一个圆柱体的侧面展开是一个边长6.28厘米的正方形，这个圆柱体的体积是多少？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 6.28</gadget>
<output>19.7192</output>

<result>19.7192</result>