We're dividing 128907 by 20 
We're looking to find how many times 20 goes into 128907.

Let's proceed to step 1:
20 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 20

Step 2:
When dividing 12 by 20, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 20

Going ahead to step 3:
20 can be fit into 128 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 120 from 128, we get 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 20

Moving on to step 4:
89 divided by 20 is 4 with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
If we subtract 80 from 89, we get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 20

On to step 5:
The number 20 fits into 90 4 times, leaving a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 644.0
If we subtract 80 from 90, we get 10.
Append the next digit (7) from the dividend to 10 and continue with: 107 / 20

Step 6:
When dividing 107 by 20, we get 5 with a remainder of 7.
Record the quotient 5 as the next digit in the result. 
Result so far: 6445.0
Subtracting 100 from 107 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
When dividing 70 by 20, we get 3 with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 6445.3
Deduct 60 from 70 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 6445.35
The remainder is 0 after subtracting 100 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
20 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6445.35
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6445.35
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 6445.35 with a remainder of 0.0.