We look at the division of 61808809 by 21 
We want to divide 61808809 by 21.

Let's proceed to step 1:
The number 21 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 21

Advancing to step 2:
When dividing 61 by 21, we get 2 with a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 42 from 61, we get 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 21

Moving on to step 3:
When dividing 198 by 21, we get 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 29.0
The remainder is 9 after subtracting 189 from 198.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 21

Step 4:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 294.0
Deduct 84 from 90 and we're left with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 21

Advancing to step 5:
When dividing 68 by 21, we get 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 2943.0
Deduct 63 from 68 and we're left with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 21

Going ahead to step 6:
When dividing 58 by 21, we get 2 with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 29432.0
Deduct 42 from 58 and we're left with 16.
Include the next digit (0) from the dividend after 16, then repeat: 160 / 21

Advancing to step 7:
21 goes into 160 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 294327.0
The remainder is 13 after subtracting 147 from 160.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 21

Advancing to step 8:
The number 21 fits into 139 6 times, leaving a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 2943276.0
Subtracting 126 from 139 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 9:
When dividing 130 by 21, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 2943276.6
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 2943276.61
Subtracting 21 from 40 leaves us 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.

Step 11:
190 divided by 21 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 2943276.619
If we take 189 away from 190, we end up 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.

Advancing to step 12:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 2943276.619
If we subtract 0 from 10, we get 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 13:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 2943276.61904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
If we divide 160 by 21, we get 7 and a remainder of 13.
The next digit of our result is 7. 
Result so far: 2943276.619047
Deduct 147 from 160 and we're left 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.

Going ahead to step 15:
21 goes into 130 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 2943276.6190476
Subtracting 126 from 130 leaves us with 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 16:
When dividing 40 by 21, we get 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 2943276.61904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 2943276.61904761 with a balance of 1.9e-08.