Let's divide 663594 by 3
Let's see how many times 3 fits into 663594.

On to step 1:
3 can be fit into 6 2 times, resulting in 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.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 3

On to step 2:
6 divided by 3 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 3

Advancing to step 3:
The number 3 fits into 3 1 times, leaving a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 221.0
Deduct 3 from 3 and we're left with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 3

Moving on to step 4:
5 divided by 3 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 2211.0
The remainder is 2 after subtracting 3 from 5.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 3

On to step 5:
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: 22119.0
The remainder is 2 after subtracting 27 from 29.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 3

Advancing to step 6:
3 goes into 24 8 times with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 221198.0
Deduct 24 from 24 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.

Step 7:
3 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 221198.0
If we take 0 away from 0, 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 8:
When dividing 0 by 3, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 221198.0
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.

The final result is 221198.0 with a remainder of 0.0.