776561 divided by 21 
We want to divide 776561 by 21.

Advancing 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
Subtracting 0 from 7 leaves us with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 21

Going ahead to step 2:
When dividing 77 by 21, we get 3 with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 63 from 77 to get 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 21

Step 3:
If we divide 146 by 21, we get 6 and a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 126 from 146 leaves us with 20.
Grab the next digit (5) from the dividend, add it to 20, then carry on: 205 / 21

Step 4:
If we divide 205 by 21, we get 9 and a remainder of 16.
Record the quotient 9 as the next digit in the result. 
Result so far: 369.0
Subtracting 189 from 205 leaves us with 16.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 21

Advancing to step 5:
If we divide 166 by 21, we get 7 and a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 3697.0
Deduct 147 from 166 and we're left with 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 21

Going ahead to step 6:
If we divide 191 by 21, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 36979.0
If we take 189 away from 191, we end up 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 7:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 36979.0
Subtracting 0 from 20 leaves us 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.

Advancing to step 8:
If we divide 200 by 21, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 36979.09
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 9:
When dividing 110 by 21, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 36979.095
The remainder is 5 after subtracting 105 from 110.
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 10:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 36979.0952
If we take 42 away from 50, we end up 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.

Going ahead to step 11:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 36979.09523
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.

Step 12:
170 divided by 21 is 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 36979.095238
If we take 168 away from 170, we end up 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.

Let's proceed to step 13:
21 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 36979.095238
Subtract 0 from 20 to 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.

Let's proceed to step 14:
If we divide 200 by 21, we get 9 and a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 36979.09523809
Subtract 189 from 200 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.

The final result is 36979.09523809 with a remainder of 1.1e-08.