Let's divide 644947 by 3
Our goal is to divide 644947 by 3.

Let's proceed to step 1:
3 can be fit into 6 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 6 from 6 and we're left with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 3

Step 2:
The number 3 fits into 4 1 times, leaving a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 3 from 4 and we're left with 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 3

On to step 3:
3 goes into 14 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 214.0
If we subtract 12 from 14, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

On to step 4:
The number 3 fits into 29 9 times, leaving a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 2149.0
Subtracting 27 from 29 leaves us with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 3

Going ahead to step 5:
The number 3 fits into 24 8 times, leaving a remainder of 0.
The next digit of our result is 8. 
Result so far: 21498.0
Deduct 24 from 24 and we're left with 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 3

Advancing to step 6:
7 divided by 3 is 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 214982.0
The remainder is 1 after subtracting 6 from 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 214982.3
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.

Step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 214982.33
Subtract 9 from 10 to 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.

The final outcome is 214982.33, with a leftover of 0.001.