It takes Xiaogang 15 minutes to walk from home to school, and he walks 80 meters per minute. How many meters does it take to go back and forth from his home to school?
小刚从家到学校要走15分钟，他每分钟走80米，从他家到学校一个来回要走多少米？
<gadget id="calculator">80 * 15 * 2</gadget>
<output>2_400</output>

<result>2_400</result>