A refrigerator consumes an average of 30 kW/h of electricity per month. There are 15 refrigerators in a dormitory building, how many kW/h is the annual electricity consumption?
一台电冰箱平均每月用电30千瓦/时．有一座宿舍楼有15台电冰箱，一年用电多少千瓦/时？
<gadget id="calculator">30 * 12 * 15</gadget>
<output>5_400</output>

<result>5_400</result>