770636 divided by 21 
We want to figure out the number of times 770636 can be divided by 21.

Let's proceed to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 21

Going ahead to step 2:
When dividing 77 by 21, we get 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 63 from 77 leaves us with 14.
Fetch the next digit (0) from the dividend, attach it to 14 and continue: 140 / 21

Going ahead to step 3:
The number 21 fits into 140 6 times, leaving a remainder of 14.
The next digit of our result is 6. 
Result so far: 36.0
Subtract 126 from 140 to get 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 21

Going ahead to step 4:
If we divide 146 by 21, we get 6 and a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 366.0
If we subtract 126 from 146, we get 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 21

Going ahead to step 5:
203 divided by 21 is 9 with a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 3669.0
The remainder is 14 after subtracting 189 from 203.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 21

On to step 6:
The number 21 fits into 146 6 times, leaving a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 36696.0
Subtracting 126 from 146 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.

Going ahead to step 7:
200 divided by 21 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 36696.9
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.

On to step 8:
When dividing 110 by 21, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 36696.95
Subtracting 105 from 110 leaves us 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 9:
21 can be fit into 50 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 36696.952
Subtracting 42 from 50 leaves us 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.

Advancing to step 10:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 36696.9523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 11:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The next digit of our result is 8. 
Result so far: 36696.95238
The remainder is 2 after subtracting 168 from 170.
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 12:
20 divided by 21 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 36696.95238
The remainder is 20 after subtracting 0 from 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 13:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 36696.9523809
If we subtract 189 from 200, we 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.

Let's proceed to step 14:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 36696.95238095
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.

After the division, we end up with 36696.95238095 and a remainder of 5e-09.