72550728 divided by 639 
Our goal is to divide 72550728 by 639.

On to step 1:
If we divide 7 by 639, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 639

Moving on to step 2:
When dividing 72 by 639, we get 0 with a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 72, we end up with 72.
Take the next digit (5) from the dividend and append it to 72, then repeat: 725 / 639

Step 3:
If we divide 725 by 639, we get 1 and a remainder of 86.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 639 from 725 to get 86.
Fetch the next digit (5) from the dividend, attach it to 86 and continue: 865 / 639

On to step 4:
865 divided by 639 is 1 with a remainder of 226.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 639 from 865 to get 226.
Append the next digit (0) from the dividend to 226 and continue with: 2260 / 639

Moving on to step 5:
When dividing 2260 by 639, we get 3 with a remainder of 343.
Record the quotient 3 as the next digit in the result. 
Result so far: 113.0
The remainder is 343 after subtracting 1917 from 2260.
Fetch the next digit (7) from the dividend, attach it to 343 and continue: 3437 / 639

Step 6:
If we divide 3437 by 639, we get 5 and a remainder of 242.
The next digit of our result is 5. 
Result so far: 1135.0
Subtract 3195 from 3437 to get 242.
Take the next digit (2) from the dividend and append it to 242, then repeat: 2422 / 639

Going ahead to step 7:
The number 639 fits into 2422 3 times, leaving a remainder of 505.
Record the quotient 3 as the next digit in the result. 
Result so far: 11353.0
If we subtract 1917 from 2422, we get 505.
Fetch the next digit (8) from the dividend, attach it to 505 and continue: 5058 / 639

Step 8:
The number 639 fits into 5058 7 times, leaving a remainder of 585.
The next digit of our result is 7. 
Result so far: 113537.0
Deduct 4473 from 5058 and we're left with 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Let's proceed to step 9:
When dividing 5850 by 639, we get 9 with a remainder of 99.
Use 9 as the next digit of our solution. 
Result so far: 113537.9
Subtracting 5751 from 5850 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Moving on to step 10:
The number 639 fits into 990 1 times, leaving a remainder of 351.
The number 1 becomes the next digit in our result. 
Result so far: 113537.91
If we take 639 away from 990, we end up with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Going ahead to step 11:
If we divide 3510 by 639, we get 5 and a remainder of 315.
Write down 5 as next digit of the result. 
Result so far: 113537.915
The remainder is 315 after subtracting 3195 from 3510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

On to step 12:
If we divide 3150 by 639, we get 4 and a remainder of 594.
Record the quotient 4 as the next digit in the result. 
Result so far: 113537.9154
Subtract 2556 from 3150 to get 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Step 13:
The number 639 fits into 5940 9 times, leaving a remainder of 189.
The next digit of our result is 9. 
Result so far: 113537.91549
If we subtract 5751 from 5940, we get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Advancing to step 14:
1890 divided by 639 is 2 with a remainder of 612.
The next digit of our result is 2. 
Result so far: 113537.915492
If we subtract 1278 from 1890, we get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

On to step 15:
When dividing 6120 by 639, we get 9 with a remainder of 369.
The number 9 becomes the next digit in our result. 
Result so far: 113537.9154929
If we subtract 5751 from 6120, we get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

On to step 16:
The number 639 fits into 3690 5 times, leaving a remainder of 495.
Record the quotient 5 as the next digit in the result. 
Result so far: 113537.91549295
The remainder is 495 after subtracting 3195 from 3690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

The final outcome is 113537.91549295, with a leftover of 4.95e-07.