1. You have 1 line.

2. This line is divided by a 0d point.

3. The resulting line is 2 lines in one.

4. You have 1 line.

5. The line is divided by 2 0d points.

6. The resulting line is 3 lines in one.

7. Division by a 0d point (0) is equal to x+1 with x equaling the number of points. Considering x equals a number points each 0d point (0) is equal to one.