We're dividing 18835160 by 639 
We're looking to find how many times 639 goes into 18835160.

Moving on to step 1:
The number 639 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 639

Advancing to step 2:
The number 639 fits into 18 0 times, leaving a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Fetch the next digit (8) from the dividend, attach it to 18 and continue: 188 / 639

Let's proceed to step 3:
188 divided by 639 is 0 with a remainder of 188.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 188 after subtracting 0 from 188.
Append the next digit (3) from the dividend to 188 and continue with: 1883 / 639

Going ahead to step 4:
When dividing 1883 by 639, we get 2 with a remainder of 605.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 605 after subtracting 1278 from 1883.
Bring next digit (5) of the dividend behind the 605 and repeat the process: 6055 / 639

On to step 5:
When dividing 6055 by 639, we get 9 with a remainder of 304.
The next digit of our result is 9. 
Result so far: 29.0
If we subtract 5751 from 6055, we get 304.
Include the next digit (1) from the dividend after 304, then repeat: 3041 / 639

Going ahead to step 6:
When dividing 3041 by 639, we get 4 with a remainder of 485.
Record the quotient 4 as the next digit in the result. 
Result so far: 294.0
If we take 2556 away from 3041, we end up with 485.
Include the next digit (6) from the dividend after 485, then repeat: 4856 / 639

Advancing to step 7:
The number 639 fits into 4856 7 times, leaving a remainder of 383.
The next digit of our result is 7. 
Result so far: 2947.0
Subtract 4473 from 4856 to get 383.
Fetch the next digit (0) from the dividend, attach it to 383 and continue: 3830 / 639

Let's proceed to step 8:
When dividing 3830 by 639, we get 5 with a remainder of 635.
Record the quotient 5 as the next digit in the result. 
Result so far: 29475.0
Subtracting 3195 from 3830 leaves us with 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Moving on to step 9:
If we divide 6350 by 639, we get 9 and a remainder of 599.
Use 9 as the next digit of our solution. 
Result so far: 29475.9
Deduct 5751 from 6350 and we're left with 599.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

On to step 10:
When dividing 5990 by 639, we get 9 with a remainder of 239.
Record the quotient 9 as the next digit in the result. 
Result so far: 29475.99
If we subtract 5751 from 5990, we get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

The final result is 29475.99 with a remainder of 0.239.