We look at the division of 12591410 by 691 
Let's see how many times 691 fits into 12591410.

Moving on to step 1:
The number 691 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 691

On to step 2:
If we divide 12 by 691, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 691

Moving on to step 3:
If we divide 125 by 691, we get 0 and a remainder of 125.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 125, we end up with 125.
Bring next digit (9) of the dividend behind the 125 and repeat the process: 1259 / 691

Moving on to step 4:
When dividing 1259 by 691, we get 1 with a remainder of 568.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 691 from 1259 to get 568.
Bring next digit (1) of the dividend behind the 568 and repeat the process: 5681 / 691

Step 5:
691 goes into 5681 8 times with a remainder of 153.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Deduct 5528 from 5681 and we're left with 153.
Take the next digit (4) from the dividend and append it to 153, then repeat: 1534 / 691

Advancing to step 6:
When dividing 1534 by 691, we get 2 with a remainder of 152.
Write down 2 as next digit of the result. 
Result so far: 182.0
Subtracting 1382 from 1534 leaves us with 152.
Bring next digit (1) of the dividend behind the 152 and repeat the process: 1521 / 691

Advancing to step 7:
1521 divided by 691 is 2 with a remainder of 139.
Write down 2 as next digit of the result. 
Result so far: 1822.0
Deduct 1382 from 1521 and we're left with 139.
Append the next digit (0) from the dividend to 139 and continue with: 1390 / 691

On to step 8:
The number 691 fits into 1390 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 18222.0
Subtract 1382 from 1390 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
The number 691 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 18222.0
Subtract 0 from 80 to get 80.
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 10:
The number 691 fits into 800 1 times, leaving a remainder of 109.
Put 1 as the next digit of the answer. 
Result so far: 18222.01
If we subtract 691 from 800, we get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 11:
The number 691 fits into 1090 1 times, leaving a remainder of 399.
Put 1 as the next digit of the answer. 
Result so far: 18222.011
If we take 691 away from 1090, we end up with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Our division results in 18222.011 with a remaining 0.0399.