Xiaogang has to walk 3.6 kilometers from home to school. After walking 0.6 kilometers to school in the morning, he found that he forgot to wear the red scarf and returned home to get the red scarf. How many kilometers would he have to walk more than usual to go to school?
小刚从家到学校要走3.6千米．早晨上学走了0.6千米后发现忘了带红领巾又返回家取红领巾，这样他比平常上学要多走多少千米？
<gadget id="calculator">0.6 * 2</gadget>
<output>1.2</output>

<result>1.2</result>