818718 divided by 21 
We're looking to find how many times 21 goes into 818718.

Going ahead to step 1:
21 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 21

Let's proceed to step 2:
The number 21 fits into 81 3 times, leaving a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 63 from 81 and we're left with 18.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 21

On to step 3:
188 divided by 21 is 8 with a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
If we take 168 away from 188, we end up with 20.
Include the next digit (7) from the dividend after 20, then repeat: 207 / 21

Moving on to step 4:
207 divided by 21 is 9 with a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 389.0
The remainder is 18 after subtracting 189 from 207.
Grab the next digit (1) from the dividend, add it to 18, then carry on: 181 / 21

Moving on to step 5:
When dividing 181 by 21, we get 8 with a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 3898.0
Subtract 168 from 181 to get 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 21

Moving on to step 6:
If we divide 138 by 21, we get 6 and a remainder of 12.
The next digit of our result is 6. 
Result so far: 38986.0
If we take 126 away from 138, 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.

Going ahead to step 7:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 38986.5
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.

Advancing to step 8:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 38986.57
If we subtract 147 from 150, we get 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 9:
When dividing 30 by 21, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 38986.571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 10:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 38986.5714
If we take 84 away from 90, we end up 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.

Let's proceed to step 11:
If we divide 60 by 21, we get 2 and a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 38986.57142
If we subtract 42 from 60, we 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.

Moving on to step 12:
If we divide 180 by 21, we get 8 and a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 38986.571428
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.

Let's proceed to step 13:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 38986.5714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 14:
150 divided by 21 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 38986.57142857
Subtracting 147 from 150 leaves us 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.

In conclusion, the division gives 38986.57142857 with a balance of 3e-09.