128818 divided by 21 
Our goal is to divide 128818 by 21.

Advancing to step 1:
21 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 21

Moving on to step 2:
21 goes into 12 0 times with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 21

On to step 3:
128 divided by 21 is 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 126 from 128, we get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

Advancing to step 4:
When dividing 28 by 21, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 61.0
If we take 21 away from 28, we end up with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 21

Going ahead to step 5:
21 can be fit into 71 3 times, resulting in a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 613.0
Subtract 63 from 71 to get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 21

Moving on to step 6:
21 goes into 88 4 times with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 6134.0
Subtract 84 from 88 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
21 goes into 40 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 6134.1
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 8:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 6134.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
10 divided by 21 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 6134.19
Deduct 0 from 10 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.

Going ahead to step 10:
The number 21 fits into 100 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 6134.1904
Deduct 84 from 100 and we're left with 16.
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 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 6134.19047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 12:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 6134.190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 6134.1904761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 6134.19047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 6134.19047619, with a leftover of 1e-09.