Xiaogang starts from home and passes through the bookstore to the park, and walks a total of 2.62 kilometers. Xiaohong starts from home, passes through the park to the bookstore, and walks a total of 3.1 kilometers. The distance between the bookstore and the park is 1.45 kilometers. How many kilometers does the Gang family need to walk? (column solution)
小刚从家出发经书店到公园，一共走了2.62千米，小红从家出发经公园到书店，一共走了3.1千米书店与公园之间的距离是1.45千米，小红家到小刚家需要走多少千米？(列式解答)
<gadget id="calculator">3.1 - 1.45</gadget>
<output>1.65</output>

<gadget id="calculator">2.62 + 1.65</gadget>
<output>4.27</output>

<result>4.27</result>