(Scenario question) There is an 18-story residential building in the east of Huayuan District, with 12 households living in each floor; a total of 144 households live in four 6-story residential buildings in the west. Which residential building has the most residents? How many households?
(情景题)花园小区东面有一幢18层的住宅楼，每层住12户人家；西面的四幢6层住宅楼里一共住144户人家．哪面住宅楼的住户多？多多少户？
<gadget id="calculator">18 * 12</gadget>
<output>216</output>

<gadget id="calculator">216 - 144</gadget>
<output>72</output>

<result>72</result>