A rectangular parallelepiped glass cylinder measures 20cm in length and 15cm in width from the inside, and the water depth in the cylinder is 6cm. A stone is completely submerged in the water and the water surface rises to 10cm. What is the volume of the stone in cm**3.
一个长方体玻璃缸，从里面量长20cm，宽15cm，缸内水深6cm，把一块石头完全侵入水中，水面上升到10cm，这块石头的体积是多少cm**3．
<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">20 * 15 * 4</gadget>
<output>1_200</output>

<result>1_200</result>