We're dividing 643632 by 3 
Let's see how many times 3 fits into 643632.

Moving on to step 1:
6 divided by 3 is 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 3

On to step 2:
When dividing 4 by 3, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 21.0
The remainder is 1 after subtracting 3 from 4.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 3

Let's proceed to step 3:
3 can be fit into 13 4 times, resulting in a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 214.0
The remainder is 1 after subtracting 12 from 13.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 3

Step 4:
If we divide 16 by 3, we get 5 and a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 2145.0
If we subtract 15 from 16, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Moving on to step 5:
The number 3 fits into 13 4 times, leaving a remainder of 1.
The next digit of our result is 4. 
Result so far: 21454.0
Deduct 12 from 13 and we're left with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 3

On to step 6:
When dividing 12 by 3, we get 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 214544.0
If we take 12 away from 12, 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.

On to step 7:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 214544.0
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.

Going ahead to step 8:
When dividing 0 by 3, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 214544.0
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.

The final result is 214544.0 with a remainder of 0.0.