I was in the same class with Lan Lan just now, and lived in the same building. One day they went home at the same time after school. Lan Lan walked 60 meters per minute. Just now, she walked 80 meters per minute. Two minutes later, she just realized that she had left her red scarf in class, so she went back to get it. Leave, and finally he and Lan Lan arrived home at the same time. How far is their home from the school?
刚刚和兰兰是同班同学，又住同一幢楼．有一天他们放学后同时回家，兰兰每分钟走60米，刚刚每分钟走80米，两分钟后，刚刚发现自己把红领巾落在班里了，就回去取，在学校耽误了5分钟才离开，最后他与兰兰同时到家．请问他们的家离学校有多远？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">60 * (9/20)</gadget>
<output>27</output>

<gadget id="calculator">80 * 27</gadget>
<output>2_160</output>

<result>2_160</result>