4639985 ÷ 255 
We want to figure out the number of times 4639985 can be divided by 255.

Let's proceed to step 1:
If we divide 4 by 255, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 255

Going ahead to step 2:
46 divided by 255 is 0 with a remainder of 46.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 46, we get 46.
Include the next digit (3) from the dividend after 46, then repeat: 463 / 255

Let's proceed to step 3:
463 divided by 255 is 1 with a remainder of 208.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 208 after subtracting 255 from 463.
Bring next digit (9) of the dividend behind the 208 and repeat the process: 2089 / 255

On to step 4:
If we divide 2089 by 255, we get 8 and a remainder of 49.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
The remainder is 49 after subtracting 2040 from 2089.
Include the next digit (9) from the dividend after 49, then repeat: 499 / 255

Moving on to step 5:
499 divided by 255 is 1 with a remainder of 244.
Use 1 as the next digit of our solution. 
Result so far: 181.0
If we take 255 away from 499, we end up with 244.
Include the next digit (8) from the dividend after 244, then repeat: 2448 / 255

Step 6:
255 can be fit into 2448 9 times, resulting in a remainder of 153.
Write down 9 as next digit of the result. 
Result so far: 1819.0
The remainder is 153 after subtracting 2295 from 2448.
Include the next digit (5) from the dividend after 153, then repeat: 1535 / 255

Going ahead to step 7:
255 can be fit into 1535 6 times, resulting in a remainder of 5.
The next digit of our result is 6. 
Result so far: 18196.0
If we subtract 1530 from 1535, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
50 divided by 255 is 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 18196.0
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 9:
If we divide 500 by 255, we get 1 and a remainder of 245.
The number 1 becomes the next digit in our result. 
Result so far: 18196.01
Deduct 255 from 500 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Going ahead to step 10:
When dividing 2450 by 255, we get 9 with a remainder of 155.
The number 9 becomes the next digit in our result. 
Result so far: 18196.019
Subtracting 2295 from 2450 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 11:
255 goes into 1550 6 times with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 18196.0196
Deduct 1530 from 1550 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 12:
200 divided by 255 is 0 with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 18196.0196
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 13:
2000 divided by 255 is 7 with a remainder of 215.
Record the quotient 7 as the next digit in the result. 
Result so far: 18196.019607
Subtracting 1785 from 2000 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Moving on to step 14:
The number 255 fits into 2150 8 times, leaving a remainder of 110.
Record the quotient 8 as the next digit in the result. 
Result so far: 18196.0196078
If we take 2040 away from 2150, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 15:
If we divide 1100 by 255, we get 4 and a remainder of 80.
Record the quotient 4 as the next digit in the result. 
Result so far: 18196.01960784
The remainder is 80 after subtracting 1020 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 18196.01960784, and the remainder is 8e-08.