A cuboid swimming pool is 50 meters long, 30 meters wide, and 4 meters high. If the pool is filled with water 3 meters deep. How many cubic meters of water need to be injected?
一个长方体的游泳池，长50米，宽30米，高4米，如果往这个水池中注入3米深的水．需要注水多少立方米？
<gadget id="calculator">50 * 30 * 3</gadget>
<output>4_500</output>

<result>4_500</result>