cuboid water tank has a length of 40 cm, a width of 20 cm, and a depth of 25 cm measured from the inside. The height of the water in the tank is 15 cm. When a cube with a side length of 10 cm is placed, how many centimeters will the water level of the tank rise?
一个长方体水箱，从里面量长40厘米，宽20厘米，深25厘米，箱中水面高15厘米，放进一棱长10厘米的正方体后，水箱的水面将上升多少厘米？
<gadget id="calculator">10 * 10 * 10</gadget>
<output>1_000</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<gadget id="calculator">1_000 / 800</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>