Xiao Ming has to walk 200 meters from home to school. One day when he walked 15 meters, he found that he did not bring his Chinese documents, so he went home to get his Chinese documents and then went to school. How many meters did Xiao Ming walk to school that day?
小明从家到学校要走200米长的路，一天他走了15米时发现语文书没带，于是他回家拿语文书再去学校，这天上学小明一共行了多少米？
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 + 200</gadget>
<output>230</output>

<result>230</result>