Let's divide 384579 by 21
Our goal is to divide 384579 by 21.

On to step 1:
3 divided by 21 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 21

Moving on to step 2:
The number 21 fits into 38 1 times, leaving a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 21 from 38 to get 17.
Include the next digit (4) from the dividend after 17, then repeat: 174 / 21

Moving on to step 3:
The number 21 fits into 174 8 times, leaving a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Subtracting 168 from 174 leaves us with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 21

Going ahead to step 4:
The number 21 fits into 65 3 times, leaving a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 183.0
Deduct 63 from 65 and we're left with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 21

On to step 5:
21 goes into 27 1 times with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 1831.0
The remainder is 6 after subtracting 21 from 27.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 21

Moving on to step 6:
21 can be fit into 69 3 times, resulting in a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 18313.0
The remainder is 6 after subtracting 63 from 69.
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:
60 divided by 21 is 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 18313.2
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.

Moving on to step 8:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 18313.28
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
When dividing 120 by 21, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 18313.285
If we take 105 away from 120, we end up 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.

Moving on to step 10:
If we divide 150 by 21, we get 7 and a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 18313.2857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 11:
21 goes into 30 1 times with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 18313.28571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 12:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 18313.285714
Deduct 84 from 90 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.

Let's proceed to step 13:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 18313.2857142
The remainder is 18 after subtracting 42 from 60.
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 14:
If we divide 180 by 21, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 18313.28571428
Subtracting 168 from 180 leaves us 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.

After the division, we end up with 18313.28571428 and a remainder of 1.2e-08.