Uncle Li’s house in Guangming Village dug a cylindrical well with a bottom circumference of 3.14m and a depth of 4m. How many cubic meters of soil were dug up?
光明村李大伯家挖一口圆柱形的水井，底面周长是3.14m，深是4m．挖出了多少立方米的土？
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 4</gadget>
<output>3.14</output>

<result>3.14</result>