We're dividing 25139409 by 11 
We want to figure out the number of times 25139409 can be divided by 11.

Going ahead to step 1:
When dividing 2 by 11, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 11

Step 2:
If we divide 25 by 11, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 22 from 25, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 11

Let's proceed to step 3:
11 can be fit into 31 2 times, resulting in a remainder of 9.
The next digit of our result is 2. 
Result so far: 22.0
Subtract 22 from 31 to get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 11

Step 4:
The number 11 fits into 93 8 times, leaving a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 228.0
Subtracting 88 from 93 leaves us with 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 11

Step 5:
11 goes into 59 5 times with a remainder of 4.
The next digit of our result is 5. 
Result so far: 2285.0
If we subtract 55 from 59, we get 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 11

Moving on to step 6:
If we divide 44 by 11, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 22854.0
Subtracting 44 from 44 leaves us with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 11

Advancing to step 7:
0 divided by 11 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 228540.0
Deduct 0 from 0 and we're left with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 11

Moving on to step 8:
11 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 2285400.0
Subtracting 0 from 9 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
11 goes into 90 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 2285400.8
If we subtract 88 from 90, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 11 fits into 20 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2285400.81
Subtract 11 from 20 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 11:
11 goes into 90 8 times with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 2285400.818
If we take 88 away from 90, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
11 can be fit into 20 1 times, resulting in a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 2285400.8181
The remainder is 9 after subtracting 11 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
90 divided by 11 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 2285400.81818
If we subtract 88 from 90, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 14:
The number 11 fits into 20 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2285400.818181
The remainder is 9 after subtracting 11 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 15:
The number 11 fits into 90 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 2285400.8181818
Subtracting 88 from 90 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 16:
When dividing 20 by 11, we get 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 2285400.81818181
Subtracting 11 from 20 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 2285400.81818181 with a remaining 9e-09.