We look at the division of 81391525 by 260 
Our goal is to divide 81391525 by 260.

Advancing to step 1:
260 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 260

Going ahead to step 2:
When dividing 81 by 260, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Fetch the next digit (3) from the dividend, attach it to 81 and continue: 813 / 260

On to step 3:
813 divided by 260 is 3 with a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 780 from 813 leaves us with 33.
Fetch the next digit (9) from the dividend, attach it to 33 and continue: 339 / 260

Step 4:
When dividing 339 by 260, we get 1 with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 31.0
If we take 260 away from 339, we end up with 79.
Take the next digit (1) from the dividend and append it to 79, then repeat: 791 / 260

Advancing to step 5:
260 goes into 791 3 times with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 313.0
Deduct 780 from 791 and we're left with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 260

On to step 6:
260 goes into 115 0 times with a remainder of 115.
Write down 0 as next digit of the result. 
Result so far: 3130.0
If we subtract 0 from 115, we get 115.
Grab the next digit (2) from the dividend, add it to 115, then carry on: 1152 / 260

Step 7:
If we divide 1152 by 260, we get 4 and a remainder of 112.
Put 4 as the next digit of the answer. 
Result so far: 31304.0
If we subtract 1040 from 1152, we get 112.
Take the next digit (5) from the dividend and append it to 112, then repeat: 1125 / 260

On to step 8:
260 goes into 1125 4 times with a remainder of 85.
Put 4 as the next digit of the answer. 
Result so far: 313044.0
Deduct 1040 from 1125 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 9:
The number 260 fits into 850 3 times, leaving a remainder of 70.
Use 3 as the next digit of our solution. 
Result so far: 313044.3
Deduct 780 from 850 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
The number 260 fits into 700 2 times, leaving a remainder of 180.
Record the quotient 2 as the next digit in the result. 
Result so far: 313044.32
Subtract 520 from 700 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 11:
The number 260 fits into 1800 6 times, leaving a remainder of 240.
The number 6 becomes the next digit in our result. 
Result so far: 313044.326
Subtract 1560 from 1800 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 12:
2400 divided by 260 is 9 with a remainder of 60.
The number 9 becomes the next digit in our result. 
Result so far: 313044.3269
Subtracting 2340 from 2400 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 13:
If we divide 600 by 260, we get 2 and a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 313044.32692
The remainder is 80 after subtracting 520 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 14:
260 can be fit into 800 3 times, resulting in a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 313044.326923
The remainder is 20 after subtracting 780 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 15:
The number 260 fits into 200 0 times, leaving a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 313044.326923
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 16:
260 can be fit into 2000 7 times, resulting in a remainder of 180.
Write down 7 as next digit of the result. 
Result so far: 313044.32692307
Subtract 1820 from 2000 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final outcome is 313044.32692307, with a leftover of 1.8e-07.