It took Xiao Ming 10 minutes to go from home to school, and he walked 80 meters per minute. After school, he went back the same way and walked an extra 20 meters per minute. How long did it take Xiao Ming to go home?
小明从家到学校用了10分钟，每分钟行80米，放学后按原路返回，每分钟多行20米，小明回家用了多少时间？
<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 * (1/10)</gadget>
<output>8</output>

<result>8</result>