If a cuboid pit with a length of 50m, a width of 30m and a depth of 50cm is to be dug on a construction site, how much earth shall be excavated? ．
建筑工地要挖一个长50m、宽30m、深50cm的长方体土坑，要挖出多少土方？．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * 30 * (1/2)</gadget>
<output>750</output>

<result>750</result>