A cuboid is 30 cm long and 20 cm wide and contains water 10 cm deep. Now there is a cuboid stone with a length and width of 8 cm and a height of 15 cm. If the stone is placed horizontally in the water, how many centimeters will the water level rise?
一个长方体长30厘米，宽20厘米，里面装有10厘米深的水．现在有一块长和宽都是8厘米，高15厘米的长方体石料．如把石料横着放在水中，水面上升多少厘米？
<gadget id="calculator">15 / 30 / 20</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">8 * 8 * (1/40)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>