128636 divided by 20 
We're looking to find how many times 20 goes into 128636.

Let's proceed to step 1:
If we divide 1 by 20, we get 0 and 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.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 20

Moving on to step 2:
When dividing 12 by 20, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 20

On to step 3:
The number 20 fits into 128 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 120 away from 128, we end up with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 20

Advancing to step 4:
86 divided by 20 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we take 80 away from 86, we end up with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 20

Going ahead to step 5:
20 can be fit into 63 3 times, resulting in a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 643.0
The remainder is 3 after subtracting 60 from 63.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 20

Moving on to step 6:
When dividing 36 by 20, we get 1 with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 6431.0
The remainder is 16 after subtracting 20 from 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 7:
20 can be fit into 160 8 times, resulting in a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 6431.8
If we take 160 away from 160, we end up 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.

On to step 8:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6431.8
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.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6431.8
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.

Our division results in 6431.8 with a remaining 0.0.