If each person saves 0.2 cubic meters of water per month, how many cubic meters of water can your class save in a year?
如果每人每月节约0.2立方米的水，你们班一年能节约水多少立方米？
<gadget id="calculator">0.2 * 50 * 12</gadget>
<output>120</output>

<result>120</result>