We look at the division of 518703 by 3 
Let's see how many times 3 fits into 518703.

Moving on to step 1:
When dividing 5 by 3, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 3 from 5 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 3

Going ahead to step 2:
3 can be fit into 21 7 times, resulting in a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtracting 21 from 21 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 3

Let's proceed to step 3:
8 divided by 3 is 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 172.0
Deduct 6 from 8 and we're left with 2.
Include the next digit (7) from the dividend after 2, then repeat: 27 / 3

On to step 4:
3 can be fit into 27 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 1729.0
If we take 27 away from 27, we end up with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 3

Step 5:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17290.0
Subtract 0 from 0 to get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 3

Going ahead to step 6:
3 divided by 3 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 172901.0
Deduct 3 from 3 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 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 172901.0
The remainder is 0 after subtracting 0 from 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:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 172901.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 172901.0 and a remainder of 0.0.