Finally, there is one left.

Take out more than half of the third time for the fourth time, and the third time is (1+ 1) × 2 = 4.

Take out more than half of the second time for the third time, and the second time is (4+ 1) × 2 = 10.

Take out more than half of the rest for the second time. For the first time, (10+ 1) × 2 = 22.

The first time I took out more than half of it, the original number was (22+ 1) × 2 = 46.