Put a stone into a cylindrical container with a bottom circumference of 6.28 decimeters and a water depth of 7.5 cm. At this time, the height of the water surface is 9 cm. What is the volume of the stone in cubic centimeters?
把一块石头放入底面周长6.28分米、水深7.5厘米的圆柱形容器内，这时水面高度为9厘米，这块石头的体积是多少立方厘米．
<gadget id="calculator">6.28 * 10</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">9 - 7.5</gadget>
<output>1.5</output>

<gadget id="calculator">3.14 * 100 * 1.5</gadget>
<output>471</output>

<result>471</result>