644390 divided by 28 
We want to divide 644390 by 28.

Moving on to step 1:
When dividing 6 by 28, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 28

Advancing to step 2:
When dividing 64 by 28, we get 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 56 away from 64, we end up with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 28

Let's proceed to step 3:
The number 28 fits into 84 3 times, leaving a remainder of 0.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 84 from 84, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 28

Step 4:
28 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 230.0
Subtract 0 from 3 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 28

Step 5:
When dividing 39 by 28, we get 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 2301.0
If we take 28 away from 39, we end up with 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 28

Going ahead to step 6:
If we divide 110 by 28, we get 3 and a remainder of 26.
Put 3 as the next digit of the answer. 
Result so far: 23013.0
If we subtract 84 from 110, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
28 can be fit into 260 9 times, resulting in a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 23013.9
If we take 252 away from 260, we end up 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.

Step 8:
80 divided by 28 is 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 23013.92
Subtract 56 from 80 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 9:
28 goes into 240 8 times with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 23013.928
The remainder is 16 after subtracting 224 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
The number 28 fits into 160 5 times, leaving a remainder of 20.
The next digit of our result is 5. 
Result so far: 23013.9285
Deduct 140 from 160 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.

Let's proceed to step 11:
200 divided by 28 is 7 with a remainder of 4.
The next digit of our result is 7. 
Result so far: 23013.92857
Subtract 196 from 200 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
28 can be fit into 40 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 23013.928571
Deduct 28 from 40 and we're left 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 13:
If we divide 120 by 28, we get 4 and a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 23013.9285714
If we take 112 away from 120, we end up 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 14:
When dividing 80 by 28, we get 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 23013.92857142
If we take 56 away from 80, we end up 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.

In conclusion, the division gives 23013.92857142 with a balance of 2.4e-08.