Let's divide 854813 by 21
Our goal is to divide 854813 by 21.

On to step 1:
8 divided by 21 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 21

On to step 2:
21 goes into 85 4 times with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 84 from 85, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 21

Let's proceed to step 3:
14 divided by 21 is 0 with a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 40.0
If we take 0 away from 14, we end up with 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 21

Moving on to step 4:
21 can be fit into 148 7 times, resulting in a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 407.0
The remainder is 1 after subtracting 147 from 148.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 21

Advancing to step 5:
The number 21 fits into 11 0 times, leaving a remainder of 11.
Write down 0 as next digit of the result. 
Result so far: 4070.0
If we subtract 0 from 11, we get 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 21

Step 6:
When dividing 113 by 21, we get 5 with a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 40705.0
Subtracting 105 from 113 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.

Let's proceed to step 7:
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: 40705.3
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 8:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 40705.38
Deduct 168 from 170 and we're left 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.

Going ahead to step 9:
If we divide 20 by 21, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 40705.38
Deduct 0 from 20 and we're left 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 10:
200 divided by 21 is 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 40705.3809
Subtracting 189 from 200 leaves us 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.

Moving on to step 11:
If we divide 110 by 21, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 40705.38095
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.

On to step 12:
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: 40705.380952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
80 divided by 21 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 40705.3809523
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.

Moving on to step 14:
170 divided by 21 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 40705.38095238
Deduct 168 from 170 and we're left 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.

Our division results in 40705.38095238 with a remaining 2e-09.