The community school plans to save 18 kilowatt-hours of electricity every day, and now it saves 4 kilowatt-hours more than the plan. According to this calculation, how much electricity can be saved in one month? (A month is calculated as 22 days)
社区学校计划每天节约18度电，现在每天比计划多节约4度电，照这样计算，一个月一共能节约多少度电？(一个月按22天计算)
<gadget id="calculator">18 + 4</gadget>
<output>22</output>

<gadget id="calculator">22 * 22</gadget>
<output>484</output>

<result>484</result>