There are 18 buildings in Dongcheng Community, each building has 5 units, and each unit has 20 households. How many households are there in this community?
东城小区有18栋楼，每栋楼有5个单元，每个单元有20户居民，这个小区一共有多少户居民？
<gadget id="calculator">20 * 5 * 18</gadget>
<output>1_800</output>

<result>1_800</result>