A farmer helps the landlord. The landlord gave him a gold bar and told him to cut it twice, with a seventh every day. Ask how to cut it?

The first section is 1/7, and the second section is 2/7.

Day 1: Take 1/7,

The next day: return the first day's 1/7 to the landlord and get 2/7 yuan.

Day 3: Take 1/7 and 2/7,

Day 4: Take another big piece, that is, 4/7 pieces.

Day 5: Take 4/7 and add 1/7.

Day 6: Return 1/7 pieces and take 2/7 and 4/7 pieces.

You can take it all back on the seventh day!