We look at the division of 198866 by 21 
We want to divide 198866 by 21.

Let's proceed to step 1:
When dividing 1 by 21, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 21

Step 2:
The number 21 fits into 19 0 times, leaving a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 21

Step 3:
The number 21 fits into 198 9 times, leaving a remainder of 9.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 189 from 198 and we're left with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 21

Let's proceed to step 4:
21 can be fit into 98 4 times, resulting in a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 94.0
The remainder is 14 after subtracting 84 from 98.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 21

Going ahead to step 5:
The number 21 fits into 146 6 times, leaving a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 946.0
Subtract 126 from 146 to get 20.
Include the next digit (6) from the dividend after 20, then repeat: 206 / 21

Step 6:
21 can be fit into 206 9 times, resulting in a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 9469.0
If we subtract 189 from 206, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
When dividing 170 by 21, we get 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 9469.8
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9469.8
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
If we divide 200 by 21, we get 9 and a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 9469.809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 10:
21 can be fit into 110 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 9469.8095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 11:
If we divide 50 by 21, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 9469.80952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
If we divide 80 by 21, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 9469.809523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 13:
170 divided by 21 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 9469.8095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
When dividing 20 by 21, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9469.8095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 9469.8095238 with a remainder of 2e-08.