A factory wants to build a cuboid sewage treatment pond, which is 30 meters long, 10 meters wide, and 5 meters deep. If 50 cubic meters of soil is excavated every day, how many days can the excavation be completed?
某工厂要建一个长方体污水处理池，长30米，宽10米，深5米，如果每天挖土50立方米，多少天可以完成挖土任务？
<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">30 * 10 * (1/10)</gadget>
<output>30</output>

<result>30</result>