Xiao Ming goes to school, the school is 1.4 kilometers away from Xiao Ming's home, after walking 0.5 kilometers, he finds that he has forgotten his Chinese documents, returns home to get the Chinese documents, and then goes to school again. How far did Xiao Ming go to school this time?
小明去上学，学校距离小明家1.4千米，走了0.5千米后发现语文书忘带了，又返回家中取语文书，然后再去上学．这次小明上学一共走了多远的路程？
<gadget id="calculator">0.5 * 2</gadget>
<output>1</output>

<gadget id="calculator">1 + 1.4</gadget>
<output>2.4</output>

<result>2.4</result>