We look at the division of 612639 by 10 
We're looking to find how many times 10 goes into 612639.

Advancing to step 1:
The number 10 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 10

Advancing to step 2:
10 can be fit into 61 6 times, resulting in a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 60 away from 61, we end up with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 10

On to step 3:
10 can be fit into 12 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 61.0
If we take 10 away from 12, we end up with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 10

Advancing to step 4:
When dividing 26 by 10, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 612.0
If we subtract 20 from 26, we get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 10

Going ahead to step 5:
63 divided by 10 is 6 with a remainder of 3.
The next digit of our result is 6. 
Result so far: 6126.0
The remainder is 3 after subtracting 60 from 63.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 10

Going ahead to step 6:
10 can be fit into 39 3 times, resulting in a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 61263.0
Subtracting 30 from 39 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
10 can be fit into 90 9 times, resulting in a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 61263.9
If we take 90 away from 90, 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.

Moving on to step 8:
10 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 61263.9
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.

Advancing to step 9:
If we divide 0 by 10, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 61263.9
Subtracting 0 from 0 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.

The final outcome is 61263.9, with a leftover of 0.0.