A cylindrical glass container with a bottom diameter of 6cm and a height of 20cm measured from the inside contains 10cm deep water. A stone is completely submerged in the water and the water depth is measured to be 12cm. What is the volume of this stone?
圆柱形玻璃容器，从里面量底面直径6cm、高20cm，里面装有10cm深的水，将一块石头完全浸入在水中后量得水深为12cm．这块石头的体积是多少？
<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<result>56.52</result>