Ma Xiaohu has to walk 1.5 kilometers from home to school. After walking 0.6 kilometers, he finds that he has no math textbooks, so Ma Xiaohu returns home to get math textbooks, and then goes to school. How many kilometers does Ma Xiaohu walk from home to school? ?
马小虎从家到学校要走1.5千米，走了0.6千米后发现没带数学课本，于是马小虎又返回家中拿数学课本，然后到学校，马小虎从家到学校共走了多少千米？
<gadget id="calculator">0.6 * 2</gadget>
<output>1.2</output>

<gadget id="calculator">1.5 + 1.2</gadget>
<output>2.7</output>

<result>2.7</result>