84739279 divided by 639 
We're looking to find how many times 639 goes into 84739279.

Let's proceed to step 1:
639 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 639

On to step 2:
If we divide 84 by 639, we get 0 and a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Include the next digit (7) from the dividend after 84, then repeat: 847 / 639

Moving on to step 3:
The number 639 fits into 847 1 times, leaving a remainder of 208.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 639 from 847 to get 208.
Grab the next digit (3) from the dividend, add it to 208, then carry on: 2083 / 639

Advancing to step 4:
639 goes into 2083 3 times with a remainder of 166.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 1917 from 2083 leaves us with 166.
Take the next digit (9) from the dividend and append it to 166, then repeat: 1669 / 639

Let's proceed to step 5:
639 can be fit into 1669 2 times, resulting in a remainder of 391.
Use 2 as the next digit of our solution. 
Result so far: 132.0
The remainder is 391 after subtracting 1278 from 1669.
Fetch the next digit (2) from the dividend, attach it to 391 and continue: 3912 / 639

Let's proceed to step 6:
3912 divided by 639 is 6 with a remainder of 78.
Use 6 as the next digit of our solution. 
Result so far: 1326.0
Subtract 3834 from 3912 to get 78.
Include the next digit (7) from the dividend after 78, then repeat: 787 / 639

Step 7:
If we divide 787 by 639, we get 1 and a remainder of 148.
The next digit of our result is 1. 
Result so far: 13261.0
Deduct 639 from 787 and we're left with 148.
Include the next digit (9) from the dividend after 148, then repeat: 1489 / 639

Going ahead to step 8:
639 goes into 1489 2 times with a remainder of 211.
The next digit of our result is 2. 
Result so far: 132612.0
If we take 1278 away from 1489, we end up with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Advancing to step 9:
639 goes into 2110 3 times with a remainder of 193.
Write down 3 as next digit of the result. 
Result so far: 132612.3
Deduct 1917 from 2110 and we're left with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Moving on to step 10:
639 can be fit into 1930 3 times, resulting in a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 132612.33
If we subtract 1917 from 1930, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 132612.33, with a leftover of 0.013.