We're dividing 638709 by 1 
Let's see how many times 1 fits into 638709.

Let's proceed to step 1:
The number 1 fits into 6 6 times, leaving a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 1

On to step 2:
1 goes into 3 3 times with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we take 3 away from 3, we end up with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 1

On to step 3:
1 goes into 8 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 638.0
The remainder is 0 after subtracting 8 from 8.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 1

Moving on to step 4:
When dividing 7 by 1, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 6387.0
Deduct 7 from 7 and we're left with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

On to step 5:
When dividing 0 by 1, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 63870.0
The remainder is 0 after subtracting 0 from 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 1

Going ahead to step 6:
When dividing 9 by 1, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 638709.0
If we subtract 9 from 9, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 638709.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 638709.0
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.

The final outcome is 638709.0, with a leftover of 0.0.