We look at the division of 644236 by 45 
We want to divide 644236 by 45.

On to step 1:
If we divide 6 by 45, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 45

On to step 2:
The number 45 fits into 64 1 times, leaving a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 45 from 64 to get 19.
Bring next digit (4) of the dividend behind the 19 and repeat the process: 194 / 45

On to step 3:
194 divided by 45 is 4 with a remainder of 14.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 180 from 194, we get 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 45

Moving on to step 4:
45 can be fit into 142 3 times, resulting in a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 143.0
Subtract 135 from 142 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 45

Step 5:
The number 45 fits into 73 1 times, leaving a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 1431.0
The remainder is 28 after subtracting 45 from 73.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 45

Going ahead to step 6:
286 divided by 45 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 14316.0
Subtracting 270 from 286 leaves us 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.

Step 7:
The number 45 fits into 160 3 times, leaving a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 14316.3
Deduct 135 from 160 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 8:
45 goes into 250 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 14316.35
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
If we divide 250 by 45, we get 5 and a remainder of 25.
The next digit of our result is 5. 
Result so far: 14316.355
If we take 225 away from 250, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

In conclusion, the division gives 14316.355 with a balance of 0.0025.