A cylindrical fish pond is being built on the east side of the scenic spot. The diameter of the pond is 20 meters and the depth is 4 meters. How many cubic meters of water can this pool hold at most after repairs?
在景区东侧正在修一个圆柱形的养鱼池，池子的直径是20米，深是4米．修好后这个水池最多可以蓄水多少立方米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100 * 4</gadget>
<output>1_256</output>

<result>1_256</result>