We're dividing 79854277 by 639 
We're looking to find how many times 639 goes into 79854277.

Step 1:
If we divide 7 by 639, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 639

Going ahead to step 2:
639 goes into 79 0 times with a remainder of 79.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 79, we end up with 79.
Bring next digit (8) of the dividend behind the 79 and repeat the process: 798 / 639

Moving on to step 3:
639 can be fit into 798 1 times, resulting in a remainder of 159.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 639 from 798 to get 159.
Append the next digit (5) from the dividend to 159 and continue with: 1595 / 639

On to step 4:
The number 639 fits into 1595 2 times, leaving a remainder of 317.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtracting 1278 from 1595 leaves us with 317.
Grab the next digit (4) from the dividend, add it to 317, then carry on: 3174 / 639

Moving on to step 5:
If we divide 3174 by 639, we get 4 and a remainder of 618.
Use 4 as the next digit of our solution. 
Result so far: 124.0
The remainder is 618 after subtracting 2556 from 3174.
Grab the next digit (2) from the dividend, add it to 618, then carry on: 6182 / 639

On to step 6:
639 goes into 6182 9 times with a remainder of 431.
The next digit of our result is 9. 
Result so far: 1249.0
If we subtract 5751 from 6182, we get 431.
Fetch the next digit (7) from the dividend, attach it to 431 and continue: 4317 / 639

On to step 7:
639 can be fit into 4317 6 times, resulting in a remainder of 483.
The next digit of our result is 6. 
Result so far: 12496.0
If we take 3834 away from 4317, we end up with 483.
Fetch the next digit (7) from the dividend, attach it to 483 and continue: 4837 / 639

Let's proceed to step 8:
When dividing 4837 by 639, we get 7 with a remainder of 364.
Record the quotient 7 as the next digit in the result. 
Result so far: 124967.0
Subtract 4473 from 4837 to get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Moving on to step 9:
When dividing 3640 by 639, we get 5 with a remainder of 445.
Write down 5 as next digit of the result. 
Result so far: 124967.5
Subtracting 3195 from 3640 leaves us with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Let's proceed to step 10:
The number 639 fits into 4450 6 times, leaving a remainder of 616.
The number 6 becomes the next digit in our result. 
Result so far: 124967.56
Subtracting 3834 from 4450 leaves us with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

On to step 11:
6160 divided by 639 is 9 with a remainder of 409.
The number 9 becomes the next digit in our result. 
Result so far: 124967.569
Deduct 5751 from 6160 and we're left with 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Let's proceed to step 12:
If we divide 4090 by 639, we get 6 and a remainder of 256.
Put 6 as the next digit of the answer. 
Result so far: 124967.5696
Deduct 3834 from 4090 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 13:
2560 divided by 639 is 4 with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 124967.56964
If we take 2556 away from 2560, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
639 goes into 40 0 times with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 124967.56964
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 15:
The number 639 fits into 400 0 times, leaving a remainder of 400.
The next digit of our result is 0. 
Result so far: 124967.56964
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 124967.56964, with a leftover of 4e-06.