A cuboid water tank is 10 decimeters long and 6 decimeters wide when measured from the inside. The depth of the existing water is 3 decimeters. When a stone is submerged in the water, the depth of the water is 4 decimeters. What is the volume of this stone in cubic decimeters?
一个长方体水箱，从里面量长是10分米，宽是6分米，现有水的深度是3分米，当把一个石块浸没在水中时，水的深度为4分米．这个石块的体积是多少立方分米？
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">10 * 6 * 1</gadget>
<output>60</output>

<result>60</result>