A water tank is 80 centimeters long and 50 centimeters wide. If 40 liters of water are poured into the water tank and it is just full, how high is the water tank in centimeters?
一个水箱长80厘米，宽50厘米，如果把40升水倒人这个水箱后，正好倒满，这个水箱高多少厘米？
<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">40 * (1/4)</gadget>
<output>10</output>

<result>10</result>