We're dividing 779913 by 21 
We're looking to find how many times 21 goes into 779913.

Moving on to step 1:
7 divided by 21 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 21

Let's proceed to step 2:
21 goes into 77 3 times with a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 63 from 77 to get 14.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 21

Step 3:
When dividing 149 by 21, we get 7 with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtracting 147 from 149 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 21

On to step 4:
The number 21 fits into 29 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 371.0
The remainder is 8 after subtracting 21 from 29.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 21

Step 5:
21 can be fit into 81 3 times, resulting in a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 3713.0
Subtracting 63 from 81 leaves us with 18.
Bring next digit (3) of the dividend behind the 18 and repeat the process: 183 / 21

Moving on to step 6:
If we divide 183 by 21, we get 8 and a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 37138.0
The remainder is 15 after subtracting 168 from 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 7:
If we divide 150 by 21, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 37138.7
Subtract 147 from 150 to 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.

Step 8:
If we divide 30 by 21, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 37138.71
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 37138.714
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 10:
When dividing 60 by 21, we get 2 with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 37138.7142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 11:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 37138.71428
Deduct 168 from 180 and we're left 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.

On to step 12:
The number 21 fits into 120 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 37138.714285
Deduct 105 from 120 and we're left 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 13:
150 divided by 21 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 37138.7142857
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.

Moving on to step 14:
30 divided by 21 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 37138.71428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

In conclusion, the division gives 37138.71428571 with a balance of 9e-09.