If 150 liters of water are poured into a cuboid water tank with a length of 80 cm and a width of 50 cm, what is the height of the water surface in cm?
在一个长是80厘米、宽50厘米的长方体水箱内注入150升水，水面高多少厘米？
<gadget id="calculator">80 * 50</gadget>
<output>4_000</output>

<gadget id="calculator">1_000 / 4_000</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">150 * (1/4)</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>