We divide 639906 by 6
We want to figure out the number of times 639906 can be divided by 6.

Let's proceed to step 1:
When dividing 6 by 6, we get 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 6 from 6 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 6

Going ahead to step 2:
When dividing 3 by 6, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 6

Advancing to step 3:
The number 6 fits into 39 6 times, leaving a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 106.0
Subtracting 36 from 39 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 6

Moving on to step 4:
The number 6 fits into 39 6 times, leaving a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 1066.0
If we take 36 away from 39, we end up with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 6

Advancing to step 5:
When dividing 30 by 6, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10665.0
If we subtract 30 from 30, we get 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 6

Going ahead to step 6:
6 can be fit into 6 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 106651.0
If we subtract 6 from 6, 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.

Step 7:
0 divided by 6 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 106651.0
Subtract 0 from 0 to 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.

Let's proceed to step 8:
When dividing 0 by 6, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 106651.0
Subtract 0 from 0 to 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.

The final outcome is 106651.0, with a leftover of 0.0.