There are 30 households in Jinyang Community. After switching to energy-saving lamps, each household can save 1.28 kWh of electricity per day. How many kWh can this community save in total in September?
金阳小区有30户居民，改用节能灯后，每户每天可节约用电1.28千瓦时，九月份这个小区一共可节约用电多少千瓦时？
<gadget id="calculator">1.28 * 30</gadget>
<output>38.4</output>

<result>38.4</result>