To build a swimming pool, it is necessary to dig a pit 50 meters long, 20 meters wide, and 1.5 meters deep. How many hours will it take to dig 25 cubic meters per hour with an excavator?
修建一个游泳池，要挖一个长50米，宽20米，深1.5米的坑．用挖土机来挖，每小时可挖25立方米，需要多少小时？
<gadget id="calculator">1.5 / 25</gadget>
<output>0.06</output>

<gadget id="calculator">50 * 20 * 0.06</gadget>
<output>60</output>

<result>60</result>