We're dividing 639309 by 28 
Let's see how many times 28 fits into 639309.

Advancing to step 1:
When dividing 6 by 28, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 28

Advancing to step 2:
28 can be fit into 63 2 times, resulting in a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 56 from 63, we get 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 28

Moving on to step 3:
If we divide 79 by 28, we get 2 and a remainder of 23.
The next digit of our result is 2. 
Result so far: 22.0
If we take 56 away from 79, we end up with 23.
Grab the next digit (3) from the dividend, add it to 23, then carry on: 233 / 28

Moving on to step 4:
233 divided by 28 is 8 with a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 228.0
Deduct 224 from 233 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 28

On to step 5:
When dividing 90 by 28, we get 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 2283.0
If we take 84 away from 90, we end up with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 28

Advancing to step 6:
The number 28 fits into 69 2 times, leaving a remainder of 13.
The next digit of our result is 2. 
Result so far: 22832.0
Subtract 56 from 69 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.

Moving on to step 7:
28 goes into 130 4 times with a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 22832.4
Deduct 112 from 130 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 8:
When dividing 180 by 28, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 22832.46
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 9:
28 can be fit into 120 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 22832.464
If we subtract 112 from 120, we 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.

Advancing to step 10:
When dividing 80 by 28, we get 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 22832.4642
Subtracting 56 from 80 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
28 goes into 240 8 times with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 22832.46428
Subtract 224 from 240 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.

On to step 12:
160 divided by 28 is 5 with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 22832.464285
If we subtract 140 from 160, we get 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 13:
When dividing 200 by 28, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 22832.4642857
Deduct 196 from 200 and we're left with 4.
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 14:
The number 28 fits into 40 1 times, leaving a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 22832.46428571
If we take 28 away from 40, 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.

In conclusion, the division gives 22832.46428571 with a balance of 1.2e-08.