Xiao Qiang walked 1.1 kilometers from home to school in the morning. After he walked 0.2 kilometers, he found that he was not wearing a red scarf, so he went home to get it. How much more kilometers did he walk than usual to go to school?
肖强早上从家到学校去上学，要走1.1千米，他走了0.2千米后，发现没有戴红领巾，又回家去取，这样他比平时上学多走了多少千米？
<gadget id="calculator">0.2 * 2</gadget>
<output>0.4</output>

<result>0.4</result>