A and B go to the same school. When A reaches the midpoint of the journey, B is still 720 meters away from the school. At this speed, when A arrives at the school, B has walked the entire distance (4/5), and his home arrives at the school. How many kilometers away?
甲、乙在同一学校上学，当甲走到全程中点时，乙离校还有720米，照这样的速度当甲到校时，乙走了全程的(4/5)，他家到学校距离多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">720 / (3/5)</gadget>
<output>1_200</output>

<result>1_200</result>