We look at the division of 80525395 by 639 
We want to figure out the number of times 80525395 can be divided by 639.

Advancing to step 1:
639 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 639

Advancing to step 2:
639 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Fetch the next digit (5) from the dividend, attach it to 80 and continue: 805 / 639

Let's proceed to step 3:
The number 639 fits into 805 1 times, leaving a remainder of 166.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 639 from 805 and we're left with 166.
Take the next digit (2) from the dividend and append it to 166, then repeat: 1662 / 639

Going ahead to step 4:
639 goes into 1662 2 times with a remainder of 384.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Deduct 1278 from 1662 and we're left with 384.
Include the next digit (5) from the dividend after 384, then repeat: 3845 / 639

Let's proceed to step 5:
639 goes into 3845 6 times with a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
Subtract 3834 from 3845 to get 11.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 639

On to step 6:
If we divide 113 by 639, we get 0 and a remainder of 113.
Use 0 as the next digit of our solution. 
Result so far: 1260.0
Deduct 0 from 113 and we're left with 113.
Take the next digit (9) from the dividend and append it to 113, then repeat: 1139 / 639

Advancing to step 7:
639 goes into 1139 1 times with a remainder of 500.
Record the quotient 1 as the next digit in the result. 
Result so far: 12601.0
If we subtract 639 from 1139, we get 500.
Grab the next digit (5) from the dividend, add it to 500, then carry on: 5005 / 639

Advancing to step 8:
639 can be fit into 5005 7 times, resulting in a remainder of 532.
Record the quotient 7 as the next digit in the result. 
Result so far: 126017.0
If we subtract 4473 from 5005, we get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Going ahead to step 9:
If we divide 5320 by 639, we get 8 and a remainder of 208.
The next digit of our result is 8. 
Result so far: 126017.8
If we subtract 5112 from 5320, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 10:
The number 639 fits into 2080 3 times, leaving a remainder of 163.
Put 3 as the next digit of the answer. 
Result so far: 126017.83
If we subtract 1917 from 2080, we get 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Moving on to step 11:
639 goes into 1630 2 times with a remainder of 352.
Write down 2 as next digit of the result. 
Result so far: 126017.832
Subtracting 1278 from 1630 leaves us with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Moving on to step 12:
3520 divided by 639 is 5 with a remainder of 325.
The number 5 becomes the next digit in our result. 
Result so far: 126017.8325
Deduct 3195 from 3520 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Going ahead to step 13:
The number 639 fits into 3250 5 times, leaving a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 126017.83255
If we take 3195 away from 3250, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The final result is 126017.83255 with a remainder of 5.5e-05.