775899 divided by 21 
We want to divide 775899 by 21.

Let's proceed to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 21

Step 2:
77 divided by 21 is 3 with a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 77, we get 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 21

Going ahead to step 3:
145 divided by 21 is 6 with a remainder of 19.
The next digit of our result is 6. 
Result so far: 36.0
If we subtract 126 from 145, we get 19.
Append the next digit (8) from the dividend to 19 and continue with: 198 / 21

On to step 4:
21 can be fit into 198 9 times, resulting in a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 369.0
Deduct 189 from 198 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 21

Moving on to step 5:
99 divided by 21 is 4 with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 3694.0
The remainder is 15 after subtracting 84 from 99.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 21

Going ahead to step 6:
If we divide 159 by 21, we get 7 and a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 36947.0
Subtracting 147 from 159 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
21 can be fit into 120 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 36947.5
Subtracting 105 from 120 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 36947.57
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
If we divide 30 by 21, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 36947.571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 10:
21 goes into 90 4 times with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 36947.5714
The remainder is 6 after subtracting 84 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 11:
When dividing 60 by 21, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 36947.57142
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 12:
When dividing 180 by 21, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 36947.571428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 13:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 36947.5714285
Subtracting 105 from 120 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 14:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 36947.57142857
Deduct 147 from 150 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

In conclusion, the division gives 36947.57142857 with a balance of 3e-09.