Xiaofang's house, Xiaoyang's house and the school are on the same straight road. Xiaofang's house is 980 meters away from the school, and Xiaoyang's house is 350 meters away from the school.
小芳家、小洋家和学校在同一条直的路上，小芳家离学校980米，小洋家离学校350米，小芳家和小洋家不可能相距多少米．
<result>280</result>