We divide 868597 by 21
We want to divide 868597 by 21.

Step 1:
When dividing 8 by 21, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 21

Let's proceed to step 2:
If we divide 86 by 21, we get 4 and a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 84 from 86 to get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

Moving on to step 3:
If we divide 28 by 21, we get 1 and a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 41.0
Deduct 21 from 28 and we're left with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 21

On to step 4:
If we divide 75 by 21, we get 3 and a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 413.0
Deduct 63 from 75 and we're left with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 21

Step 5:
21 goes into 129 6 times with a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 4136.0
Subtract 126 from 129 to get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 21

Advancing to step 6:
37 divided by 21 is 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 41361.0
If we subtract 21 from 37, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 41361.7
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
21 goes into 130 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 41361.76
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
If we divide 40 by 21, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 41361.761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 10:
190 divided by 21 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 41361.7619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 11:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 41361.7619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 12:
21 goes into 100 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 41361.761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
21 goes into 160 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 41361.7619047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 14:
When dividing 130 by 21, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 41361.76190476
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 41361.76190476 and a remainder of 4e-09.