We're dividing 12516129 by 263 
We want to divide 12516129 by 263.

Advancing to step 1:
The number 263 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 263

Let's proceed to step 2:
12 divided by 263 is 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 263

On to step 3:
When dividing 125 by 263, we get 0 with a remainder of 125.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 125 leaves us with 125.
Append the next digit (1) from the dividend to 125 and continue with: 1251 / 263

Going ahead to step 4:
263 goes into 1251 4 times with a remainder of 199.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 199 after subtracting 1052 from 1251.
Take the next digit (6) from the dividend and append it to 199, then repeat: 1996 / 263

Step 5:
The number 263 fits into 1996 7 times, leaving a remainder of 155.
Use 7 as the next digit of our solution. 
Result so far: 47.0
The remainder is 155 after subtracting 1841 from 1996.
Grab the next digit (1) from the dividend, add it to 155, then carry on: 1551 / 263

Moving on to step 6:
263 can be fit into 1551 5 times, resulting in a remainder of 236.
Write down 5 as next digit of the result. 
Result so far: 475.0
Subtract 1315 from 1551 to get 236.
Include the next digit (2) from the dividend after 236, then repeat: 2362 / 263

Advancing to step 7:
If we divide 2362 by 263, we get 8 and a remainder of 258.
Write down 8 as next digit of the result. 
Result so far: 4758.0
Subtract 2104 from 2362 to get 258.
Fetch the next digit (9) from the dividend, attach it to 258 and continue: 2589 / 263

Moving on to step 8:
When dividing 2589 by 263, we get 9 with a remainder of 222.
The number 9 becomes the next digit in our result. 
Result so far: 47589.0
If we subtract 2367 from 2589, we get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Step 9:
2220 divided by 263 is 8 with a remainder of 116.
The number 8 becomes the next digit in our result. 
Result so far: 47589.8
Deduct 2104 from 2220 and we're left with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Going ahead to step 10:
When dividing 1160 by 263, we get 4 with a remainder of 108.
Write down 4 as next digit of the result. 
Result so far: 47589.84
If we take 1052 away from 1160, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 11:
The number 263 fits into 1080 4 times, leaving a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 47589.844
Subtracting 1052 from 1080 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The quotient of the division is 47589.844, and the remainder is 0.0028.