Xiao Zhang said that the living area of our family of three is 87 square meters. Xiao Ming said that there are five people in my family and the living area is 140 square meters. Which family has the largest per capita living area and how much is it?
小张说我们一家三口居住面积是87平方米，小明说我家有五口人居住面积是140平方米，谁家的人均居住面积大，大多少？
<gadget id="calculator">87 / 3</gadget>
<output>29</output>

<gadget id="calculator">140 / 5</gadget>
<output>28</output>

<gadget id="calculator">29 - 28</gadget>
<output>1</output>

<result>1</result>