We look at the division of 510707 by 3 
We want to figure out the number of times 510707 can be divided by 3.

Let's proceed to step 1:
3 goes into 5 1 times with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 2 after subtracting 3 from 5.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 3

Advancing to step 2:
21 divided by 3 is 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 21 from 21, we get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 3

Advancing to step 3:
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: 170.0
If we take 0 away from 0, we end up with 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 3

Moving on to step 4:
When dividing 7 by 3, we get 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 1702.0
Deduct 6 from 7 and we're left with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 3

Going ahead to step 5:
If we divide 10 by 3, we get 3 and a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 17023.0
If we subtract 9 from 10, we get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

Moving on to step 6:
3 goes into 17 5 times with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 170235.0
If we take 15 away from 17, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
3 goes into 20 6 times with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 170235.6
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 170235.66
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 170235.66, with a leftover of 0.002.