A cylinder filled with oil has a height of 3 meters and a diameter of 2 meters measured from the inside. When a stone is immersed in oil, the oil level rises by 1 meter, what is the volume of the stone?
一个装有油的圆柱形油桶，油面高3米，从里面量底面直径是2米．当将一石块浸入油中时油面上升1米，这个石块的体积是多少？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

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

<result>3.14</result>