636391 ÷ 4 
We want to divide 636391 by 4.

Moving on to step 1:
When dividing 6 by 4, we get 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 4 from 6 and we're left with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 4

Step 2:
The number 4 fits into 23 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 15.0
The remainder is 3 after subtracting 20 from 23.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 4

Advancing to step 3:
When dividing 36 by 4, we get 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtract 36 from 36 to get 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 4

Step 4:
When dividing 3 by 4, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 1590.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 4

Moving on to step 5:
If we divide 39 by 4, we get 9 and a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 15909.0
Subtract 36 from 39 to get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 4

Going ahead to step 6:
4 goes into 31 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 159097.0
If we take 28 away from 31, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
4 can be fit into 30 7 times, resulting in a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 159097.7
The remainder is 2 after subtracting 28 from 30.
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.
Use 5 as the next digit of our solution. 
Result so far: 159097.75
Deduct 20 from 20 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.

Going ahead to step 9:
0 divided by 4 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 159097.75
Subtract 0 from 0 to 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.

Moving on to step 10:
0 divided by 4 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 159097.75
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.

In conclusion, the division gives 159097.75 with a balance of 0.0.