We're dividing 439141 by 21 
We want to divide 439141 by 21.

On to step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 21

Step 2:
When dividing 43 by 21, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 42 from 43 and we're left with 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 21

Step 3:
When dividing 19 by 21, we get 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 19 leaves us with 19.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 21

Advancing to step 4:
If we divide 191 by 21, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 209.0
Deduct 189 from 191 and we're left with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 21

Step 5:
24 divided by 21 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 2091.0
If we take 21 away from 24, we end up with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 21

Let's proceed to step 6:
31 divided by 21 is 1 with a remainder of 10.
The next digit of our result is 1. 
Result so far: 20911.0
If we subtract 21 from 31, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
21 goes into 100 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 20911.4
Deduct 84 from 100 and we're left with 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 8:
When dividing 160 by 21, we get 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 20911.47
If we subtract 147 from 160, we get 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 9:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 20911.476
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.

Advancing to step 10:
21 goes into 40 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 20911.4761
If we take 21 away from 40, we end up with 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 11:
If we divide 190 by 21, we get 9 and a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 20911.47619
If we subtract 189 from 190, we get 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 12:
If we divide 10 by 21, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 20911.47619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 20911.4761904
Subtract 84 from 100 to 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 14:
21 goes into 160 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 20911.47619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 20911.47619047 with a remaining 1.3e-08.