We look at the division of 639316 by 3 
Let's see how many times 3 fits into 639316.

Going ahead to step 1:
3 goes into 6 2 times with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 6 from 6 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 3

Advancing to step 2:
3 divided by 3 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 21.0
If we subtract 3 from 3, we get 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 3

On to step 3:
If we divide 9 by 3, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 213.0
Deduct 9 from 9 and we're left with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 3

Moving on to step 4:
3 can be fit into 3 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 2131.0
The remainder is 0 after subtracting 3 from 3.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 3

Moving on to step 5:
3 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 21310.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 3

Advancing to step 6:
When dividing 16 by 3, we get 5 with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 213105.0
If we take 15 away from 16, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 213105.3
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 213105.33
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 213105.33, with a leftover of 0.001.