We divide 639737 by 5
We're looking to find how many times 5 goes into 639737.

On to step 1:
6 divided by 5 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 5 from 6 and we're left with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 5

Step 2:
When dividing 13 by 5, we get 2 with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 10 from 13 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 5

Step 3:
5 goes into 39 7 times with a remainder of 4.
The next digit of our result is 7. 
Result so far: 127.0
If we take 35 away from 39, we end up with 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 5

Advancing to step 4:
The number 5 fits into 47 9 times, leaving a remainder of 2.
The next digit of our result is 9. 
Result so far: 1279.0
The remainder is 2 after subtracting 45 from 47.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 5

Moving on to step 5:
If we divide 23 by 5, we get 4 and a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 12794.0
If we take 20 away from 23, we end up with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 5

On to step 6:
5 goes into 37 7 times with a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 127947.0
If we subtract 35 from 37, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
The number 5 fits into 20 4 times, leaving a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 127947.4
Subtracting 20 from 20 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
5 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 127947.4
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
If we divide 0 by 5, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 127947.4
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 127947.4 with a remaining 0.0.