640259 ÷ 4 
Let's see how many times 4 fits into 640259.

Step 1:
If we divide 6 by 4, we get 1 and a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 4 from 6 and we're left with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 4

Moving on to step 2:
4 can be fit into 24 6 times, resulting in a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 24 from 24, we get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 4

Step 3:
0 divided by 4 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 160.0
Subtract 0 from 0 to get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 4

Moving on to step 4:
If we divide 2 by 4, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 1600.0
If we take 0 away from 2, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 4

Step 5:
The number 4 fits into 25 6 times, leaving a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 16006.0
The remainder is 1 after subtracting 24 from 25.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 4

Going ahead to step 6:
4 goes into 19 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 160064.0
The remainder is 3 after subtracting 16 from 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
4 can be fit into 30 7 times, resulting in a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 160064.7
Deduct 28 from 30 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
If we divide 20 by 4, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 160064.75
If we subtract 20 from 20, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
If we divide 0 by 4, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 160064.75
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 4 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 160064.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 160064.75 and a remainder of 0.0.