The distance from Xiao Ming's house to the school is 378 meters. He goes back and forth on this road twice a day. How many meters will he walk in total?
小明家到学校的路程是378米，他每天在这条路上往返两次，一共大约要走多少米．
<gadget id="calculator">4 * 378</gadget>
<output>1_512</output>

<result>1_512</result>