We look at the division of 862665 by 21 
We want to figure out the number of times 862665 can be divided by 21.

Advancing to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 21

Let's proceed to step 2:
86 divided by 21 is 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 84 from 86 leaves us with 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 21

Going ahead to step 3:
22 divided by 21 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we take 21 away from 22, we end up with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 21

Going ahead to step 4:
If we divide 16 by 21, we get 0 and a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 410.0
Subtracting 0 from 16 leaves us with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 21

Going ahead to step 5:
21 goes into 166 7 times with a remainder of 19.
The next digit of our result is 7. 
Result so far: 4107.0
If we subtract 147 from 166, we get 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 21

Let's proceed to step 6:
When dividing 195 by 21, we get 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 41079.0
Deduct 189 from 195 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
When dividing 60 by 21, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 41079.2
Subtract 42 from 60 to 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.

Advancing to step 8:
180 divided by 21 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 41079.28
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 41079.285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 10:
150 divided by 21 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 41079.2857
If we take 147 away from 150, we end up 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.

Going ahead to step 11:
If we divide 30 by 21, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 41079.28571
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.

Going ahead to step 12:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 41079.285714
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 13:
60 divided by 21 is 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 41079.2857142
Subtracting 42 from 60 leaves us 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.

Going ahead to step 14:
21 goes into 180 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 41079.28571428
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.

The final result is 41079.28571428 with a remainder of 1.2e-08.