There were originally 480 households in Chenguang Garden Community, but 15 buildings were built this year, and 48 households moved into each building. How many households are there in total now?
晨光花园小区原有居民480户，今年又盖了15幢楼房，每幢楼房搬进48户居民，现在共有居民多少户？
<gadget id="calculator">15 * 48</gadget>
<output>720</output>

<gadget id="calculator">720 + 480</gadget>
<output>1_200</output>

<result>1_200</result>