There are 40 people in Class 4 and 2. If each person saves 0.02 cubic meters of water per day on average, how many cubic meters of water can be saved in April?
四2班有40人，如果每人每天平均节约用水0.02立方米，四月份能节约用水多少立方米？
<gadget id="calculator">0.02 * 40 * 30</gadget>
<output>24</output>

<result>24</result>