cube glass container has a side length of 3 decimeters measured from the inside. There is water with a height of 10 cm inside, and after a stone is put in, the water level rises to 15 cm (the stone is completely immersed in the water). What is the volume of the stone in cubic centimeters?
一个正方体玻璃容器，从里面量棱长为3分米．里面装有高10厘米的水，放入一块石头后，水面上升到15厘米(石头完全浸入水中)．石头的体积是多少立方厘米？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">15 - 10</gadget>
<output>5</output>

<gadget id="calculator">30 * 30 * 5</gadget>
<output>4_500</output>

<result>4_500</result>