We're dividing 25312579 by 231 
We want to figure out the number of times 25312579 can be divided by 231.

On to step 1:
When dividing 2 by 231, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 231

Going ahead to step 2:
231 goes into 25 0 times with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Include the next digit (3) from the dividend after 25, then repeat: 253 / 231

Moving on to step 3:
When dividing 253 by 231, we get 1 with a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 231 from 253 and we're left with 22.
Grab the next digit (1) from the dividend, add it to 22, then carry on: 221 / 231

Let's proceed to step 4:
The number 231 fits into 221 0 times, leaving a remainder of 221.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 221 after subtracting 0 from 221.
Include the next digit (2) from the dividend after 221, then repeat: 2212 / 231

Step 5:
231 goes into 2212 9 times with a remainder of 133.
The next digit of our result is 9. 
Result so far: 109.0
Subtract 2079 from 2212 to get 133.
Include the next digit (5) from the dividend after 133, then repeat: 1335 / 231

Advancing to step 6:
If we divide 1335 by 231, we get 5 and a remainder of 180.
The number 5 becomes the next digit in our result. 
Result so far: 1095.0
If we take 1155 away from 1335, we end up with 180.
Fetch the next digit (7) from the dividend, attach it to 180 and continue: 1807 / 231

Step 7:
231 goes into 1807 7 times with a remainder of 190.
Write down 7 as next digit of the result. 
Result so far: 10957.0
Deduct 1617 from 1807 and we're left with 190.
Take the next digit (9) from the dividend and append it to 190, then repeat: 1909 / 231

Let's proceed to step 8:
231 goes into 1909 8 times with a remainder of 61.
Put 8 as the next digit of the answer. 
Result so far: 109578.0
Deduct 1848 from 1909 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

On to step 9:
231 can be fit into 610 2 times, resulting in a remainder of 148.
Write down 2 as next digit of the result. 
Result so far: 109578.2
Deduct 462 from 610 and we're left with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Advancing to step 10:
The number 231 fits into 1480 6 times, leaving a remainder of 94.
The next digit of our result is 6. 
Result so far: 109578.26
Deduct 1386 from 1480 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 11:
231 goes into 940 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 109578.264
If we take 924 away from 940, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
231 goes into 160 0 times with a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 109578.264
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 13:
231 can be fit into 1600 6 times, resulting in a remainder of 214.
The number 6 becomes the next digit in our result. 
Result so far: 109578.26406
If we take 1386 away from 1600, we end up with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Going ahead to step 14:
If we divide 2140 by 231, we get 9 and a remainder of 61.
The next digit of our result is 9. 
Result so far: 109578.264069
Subtract 2079 from 2140 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 15:
The number 231 fits into 610 2 times, leaving a remainder of 148.
Use 2 as the next digit of our solution. 
Result so far: 109578.2640692
Subtracting 462 from 610 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Let's proceed to step 16:
If we divide 1480 by 231, we get 6 and a remainder of 94.
The number 6 becomes the next digit in our result. 
Result so far: 109578.26406926
Subtracting 1386 from 1480 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

The final outcome is 109578.26406926, with a leftover of 9.4e-08.