503455 divided by 3 
Let's see how many times 3 fits into 503455.

Moving on to step 1:
The number 3 fits into 5 1 times, leaving a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 3 from 5, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 3

Let's proceed to step 2:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 16.0
The remainder is 2 after subtracting 18 from 20.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 3

Step 3:
23 divided by 3 is 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 167.0
Deduct 21 from 23 and we're left with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 3

Step 4:
24 divided by 3 is 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 1678.0
If we subtract 24 from 24, we get 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 3

Step 5:
3 goes into 5 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 16781.0
If we subtract 3 from 5, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

On to step 6:
3 goes into 25 8 times with a remainder of 1.
The next digit of our result is 8. 
Result so far: 167818.0
The remainder is 1 after subtracting 24 from 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 167818.3
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.

Going ahead to step 8:
3 goes into 10 3 times with a remainder of 1.
The next digit of our result is 3. 
Result so far: 167818.33
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 quotient of the division is 167818.33, and the remainder is 0.001.