We divide 13903491 by 8
We're looking to find how many times 8 goes into 13903491.

On to step 1:
8 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 8

Moving on to step 2:
When dividing 13 by 8, we get 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 8 from 13 and we're left with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 8

On to step 3:
The number 8 fits into 59 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtracting 56 from 59 leaves us with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 8

Let's proceed to step 4:
If we divide 30 by 8, we get 3 and a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 173.0
Subtracting 24 from 30 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 8

Going ahead to step 5:
8 goes into 63 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 1737.0
Subtract 56 from 63 to get 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 8

Advancing to step 6:
8 can be fit into 74 9 times, resulting in a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 17379.0
Subtract 72 from 74 to get 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 8

Going ahead to step 7:
29 divided by 8 is 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 173793.0
Subtracting 24 from 29 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 8

Let's proceed to step 8:
The number 8 fits into 51 6 times, leaving a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 1737936.0
Deduct 48 from 51 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
If we divide 30 by 8, we get 3 and a remainder of 6.
The next digit of our result is 3. 
Result so far: 1737936.3
Subtracting 24 from 30 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 10:
If we divide 60 by 8, we get 7 and a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 1737936.37
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 11:
The number 8 fits into 40 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1737936.375
If we subtract 40 from 40, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
When dividing 0 by 8, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1737936.375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1737936.375
If we take 0 away from 0, we end up 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 1737936.375, with a leftover of 0.0.