8764335 divided by 639 
Our goal is to divide 8764335 by 639.

Step 1:
8 divided by 639 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 639

Let's proceed to step 2:
When dividing 87 by 639, we get 0 with a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Grab the next digit (6) from the dividend, add it to 87, then carry on: 876 / 639

Going ahead to step 3:
If we divide 876 by 639, we get 1 and a remainder of 237.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 237 after subtracting 639 from 876.
Fetch the next digit (4) from the dividend, attach it to 237 and continue: 2374 / 639

Let's proceed to step 4:
639 goes into 2374 3 times with a remainder of 457.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Deduct 1917 from 2374 and we're left with 457.
Grab the next digit (3) from the dividend, add it to 457, then carry on: 4573 / 639

Step 5:
If we divide 4573 by 639, we get 7 and a remainder of 100.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
If we subtract 4473 from 4573, we get 100.
Take the next digit (3) from the dividend and append it to 100, then repeat: 1003 / 639

On to step 6:
If we divide 1003 by 639, we get 1 and a remainder of 364.
The number 1 becomes the next digit in our result. 
Result so far: 1371.0
If we subtract 639 from 1003, we get 364.
Grab the next digit (5) from the dividend, add it to 364, then carry on: 3645 / 639

Step 7:
639 goes into 3645 5 times with a remainder of 450.
The next digit of our result is 5. 
Result so far: 13715.0
Subtract 3195 from 3645 to get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Going ahead to step 8:
639 can be fit into 4500 7 times, resulting in a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 13715.7
If we take 4473 away from 4500, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 9:
639 can be fit into 270 0 times, resulting in a remainder of 270.
Put 0 as the next digit of the answer. 
Result so far: 13715.7
The remainder is 270 after subtracting 0 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 10:
639 goes into 2700 4 times with a remainder of 144.
Write down 4 as next digit of the result. 
Result so far: 13715.704
Deduct 2556 from 2700 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 11:
If we divide 1440 by 639, we get 2 and a remainder of 162.
Write down 2 as next digit of the result. 
Result so far: 13715.7042
Subtract 1278 from 1440 to get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 12:
If we divide 1620 by 639, we get 2 and a remainder of 342.
The number 2 becomes the next digit in our result. 
Result so far: 13715.70422
If we subtract 1278 from 1620, we get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

The final outcome is 13715.70422, with a leftover of 0.000342.