The villagers of Yongxing Village raised funds to build a 5-kilometer-long canal with a surface width of 1.2 meters, a canal bottom width of 0.8 meters, and a canal height of 0.5 meters. It is planned to be dug in 20 days.
永兴村村民集资修一条长5千米的水渠，渠面宽1.2米，渠底宽0.8米，渠高0.5米，计划20天挖完，平均每天挖土多少立方米？
<gadget id="calculator">1.2 + 0.8</gadget>
<output>2</output>

<gadget id="calculator">0.5 / 2</gadget>
<output>0.25</output>

<gadget id="calculator">1_000 / 20</gadget>
<output>50</output>

<gadget id="calculator">2 * 0.25 * 5 * 50</gadget>
<output>125</output>

<result>125</result>