Fangfang's family lives on the 7th floor. It took her 80 seconds to go from the 1st floor to the 3rd floor. How many minutes does it take her to get from the 1st floor to her home?
芳芳家住在7楼，她从1楼到3楼用了80秒，她从1楼到家一共要多少分钟．
<result>4</result>