779321 divided by 21 
We want to figure out the number of times 779321 can be divided by 21.

Advancing to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 21

On to step 2:
The number 21 fits into 77 3 times, leaving a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 63 from 77 to get 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 21

Let's proceed to step 3:
The number 21 fits into 149 7 times, leaving a remainder of 2.
The next digit of our result is 7. 
Result so far: 37.0
Deduct 147 from 149 and we're left with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 21

Moving on to step 4:
21 can be fit into 23 1 times, resulting in a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 371.0
Subtracting 21 from 23 leaves us with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 21

On to step 5:
21 can be fit into 22 1 times, resulting in a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 3711.0
If we take 21 away from 22, we end up with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 21

Advancing to step 6:
21 goes into 11 0 times with a remainder of 11.
Write down 0 as next digit of the result. 
Result so far: 37110.0
The remainder is 11 after subtracting 0 from 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
When dividing 110 by 21, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 37110.5
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.

Step 8:
If we divide 50 by 21, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 37110.52
The remainder is 8 after subtracting 42 from 50.
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:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 37110.523
Subtracting 63 from 80 leaves us with 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 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: 37110.5238
Deduct 168 from 170 and we're left with 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 11:
20 divided by 21 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 37110.5238
Deduct 0 from 20 and we're left 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 12:
If we divide 200 by 21, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 37110.523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 37110.5238095
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.

Going ahead 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: 37110.52380952
Deduct 42 from 50 and we're left 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 final result is 37110.52380952 with a remainder of 8e-09.