City Experimental Primary School dug a cylindrical well in the botanical garden, with a bottom diameter of 2 meters and a depth of 2.5 meters below the ground. How many cubic meters of earth and rock were dug out of this well?
市实验小学在植物园内挖了一口圆柱形水井，底面直径是2米，地面以下深2.5米．挖这口井挖出的土石有多少立方米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">3.14 * 1 * 2.5</gadget>
<output>7.85</output>

<result>7.85</result>