Xiao Ming's home is 1.5 kilometers away from the school. One morning, Xiao Ming walked to school and walked 0.6 kilometers away from home, and found that he did not bring his homework. He went home to pick it up, and then walked back to school. How many kilometers did Xiao Ming walk to school this time? ?
小明家距学校1.5千米，一天早晨小明上学步行到距家0.6千米处发现手工作业未带，回家去取，然后又走回学校，小明这次上学校一共走了多少千米的路？
<gadget id="calculator">0.6 * 2</gadget>
<output>1.2</output>

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

<result>2.7</result>