661133 divided by 21 
Let's see how many times 21 fits into 661133.

On to step 1:
6 divided by 21 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 21

Going ahead to step 2:
The number 21 fits into 66 3 times, leaving a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 63 away from 66, we end up with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 21

Advancing to step 3:
When dividing 31 by 21, we get 1 with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we subtract 21 from 31, we get 10.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 21

On to step 4:
21 can be fit into 101 4 times, resulting in a remainder of 17.
The next digit of our result is 4. 
Result so far: 314.0
The remainder is 17 after subtracting 84 from 101.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 21

Going ahead to step 5:
173 divided by 21 is 8 with a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 3148.0
The remainder is 5 after subtracting 168 from 173.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

Advancing to step 6:
If we divide 53 by 21, we get 2 and a remainder of 11.
Write down 2 as next digit of the result. 
Result so far: 31482.0
Subtract 42 from 53 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.

On to step 7:
If we divide 110 by 21, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 31482.5
Deduct 105 from 110 and we're left with 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 8:
If we divide 50 by 21, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 31482.52
Subtract 42 from 50 to 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.

Step 9:
If we divide 80 by 21, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 31482.523
The remainder is 17 after subtracting 63 from 80.
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 10:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 31482.5238
The remainder is 2 after subtracting 168 from 170.
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 11:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 31482.5238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
200 divided by 21 is 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 31482.523809
If we subtract 189 from 200, we 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.

Moving on to step 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 31482.5238095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 14:
The number 21 fits into 50 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 31482.52380952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 31482.52380952, and the remainder is 8e-09.