We're dividing 15314786 by 510 
We want to figure out the number of times 15314786 can be divided by 510.

Going ahead to step 1:
If we divide 1 by 510, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 510

On to step 2:
510 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 510

Going ahead to step 3:
The number 510 fits into 153 0 times, leaving a remainder of 153.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 153, we end up with 153.
Fetch the next digit (1) from the dividend, attach it to 153 and continue: 1531 / 510

Moving on to step 4:
510 goes into 1531 3 times with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 1 after subtracting 1530 from 1531.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 510

Moving on to step 5:
If we divide 14 by 510, we get 0 and a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Subtracting 0 from 14 leaves us with 14.
Bring next digit (7) of the dividend behind the 14 and repeat the process: 147 / 510

On to step 6:
When dividing 147 by 510, we get 0 with a remainder of 147.
Put 0 as the next digit of the answer. 
Result so far: 300.0
Subtracting 0 from 147 leaves us with 147.
Append the next digit (8) from the dividend to 147 and continue with: 1478 / 510

Moving on to step 7:
510 goes into 1478 2 times with a remainder of 458.
The next digit of our result is 2. 
Result so far: 3002.0
Subtracting 1020 from 1478 leaves us with 458.
Take the next digit (6) from the dividend and append it to 458, then repeat: 4586 / 510

On to step 8:
4586 divided by 510 is 8 with a remainder of 506.
The next digit of our result is 8. 
Result so far: 30028.0
If we subtract 4080 from 4586, we get 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Step 9:
510 can be fit into 5060 9 times, resulting in a remainder of 470.
Write down 9 as next digit of the result. 
Result so far: 30028.9
Deduct 4590 from 5060 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Step 10:
When dividing 4700 by 510, we get 9 with a remainder of 110.
Write down 9 as next digit of the result. 
Result so far: 30028.99
Subtracting 4590 from 4700 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

The final result is 30028.99 with a remainder of 0.11.