Let's divide 12915860 by 514
We're looking to find how many times 514 goes into 12915860.

Going ahead to step 1:
The number 514 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 514

Going ahead to step 2:
If we divide 12 by 514, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 514

On to step 3:
514 goes into 129 0 times with a remainder of 129.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 129, we get 129.
Append the next digit (1) from the dividend to 129 and continue with: 1291 / 514

Step 4:
When dividing 1291 by 514, we get 2 with a remainder of 263.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 1028 from 1291 to get 263.
Take the next digit (5) from the dividend and append it to 263, then repeat: 2635 / 514

Moving on to step 5:
2635 divided by 514 is 5 with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Deduct 2570 from 2635 and we're left with 65.
Grab the next digit (8) from the dividend, add it to 65, then carry on: 658 / 514

Step 6:
658 divided by 514 is 1 with a remainder of 144.
The next digit of our result is 1. 
Result so far: 251.0
The remainder is 144 after subtracting 514 from 658.
Bring next digit (6) of the dividend behind the 144 and repeat the process: 1446 / 514

Let's proceed to step 7:
When dividing 1446 by 514, we get 2 with a remainder of 418.
Put 2 as the next digit of the answer. 
Result so far: 2512.0
Subtracting 1028 from 1446 leaves us with 418.
Take the next digit (0) from the dividend and append it to 418, then repeat: 4180 / 514

Let's proceed to step 8:
The number 514 fits into 4180 8 times, leaving a remainder of 68.
Record the quotient 8 as the next digit in the result. 
Result so far: 25128.0
If we take 4112 away from 4180, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
If we divide 680 by 514, we get 1 and a remainder of 166.
The number 1 becomes the next digit in our result. 
Result so far: 25128.1
If we take 514 away from 680, we end up with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Step 10:
514 goes into 1660 3 times with a remainder of 118.
Put 3 as the next digit of the answer. 
Result so far: 25128.13
Subtract 1542 from 1660 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Going ahead to step 11:
If we divide 1180 by 514, we get 2 and a remainder of 152.
Use 2 as the next digit of our solution. 
Result so far: 25128.132
If we take 1028 away from 1180, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Moving on to step 12:
If we divide 1520 by 514, we get 2 and a remainder of 492.
Write down 2 as next digit of the result. 
Result so far: 25128.1322
If we subtract 1028 from 1520, we get 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

The final result is 25128.1322 with a remainder of 0.00492.