12251372 ÷ 8 
We're looking to find how many times 8 goes into 12251372.

Going ahead to step 1:
If we divide 1 by 8, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 8

Going ahead to step 2:
12 divided by 8 is 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 8 from 12 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 8

Advancing to step 3:
The number 8 fits into 42 5 times, leaving a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 2 after subtracting 40 from 42.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 8

On to step 4:
If we divide 25 by 8, we get 3 and a remainder of 1.
The next digit of our result is 3. 
Result so far: 153.0
The remainder is 1 after subtracting 24 from 25.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 8

Let's proceed to step 5:
When dividing 11 by 8, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1531.0
If we take 8 away from 11, we end up with 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 8

Let's proceed to step 6:
The number 8 fits into 33 4 times, leaving a remainder of 1.
The next digit of our result is 4. 
Result so far: 15314.0
The remainder is 1 after subtracting 32 from 33.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 8

Going ahead to step 7:
When dividing 17 by 8, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 153142.0
If we subtract 16 from 17, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 8

Let's proceed to step 8:
The number 8 fits into 12 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 1531421.0
Subtract 8 from 12 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
40 divided by 8 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1531421.5
Deduct 40 from 40 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
When dividing 0 by 8, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1531421.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
8 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1531421.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 1531421.5, with a leftover of 0.0.