Pour 80 liters of water into a cuboid water tank whose bottom side is 40 cm long and whose height is 60 cm. What is the height of the water in the tank?
把80升水倒入底面边长是40厘米的正方形，高60厘米的长方体水箱中，水箱中的水面的高是多少厘米．
<gadget id="calculator">40 * 40</gadget>
<output>1_600</output>

<gadget id="calculator">1_000 / 1_600</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">80 * (5/8)</gadget>
<output>50</output>

<result>50</result>