12396420 divided by 800 
We want to divide 12396420 by 800.

Advancing to step 1:
If we divide 1 by 800, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 800

Let's proceed to step 2:
The number 800 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 800

Moving on to step 3:
When dividing 123 by 800, we get 0 with a remainder of 123.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 123 leaves us with 123.
Grab the next digit (9) from the dividend, add it to 123, then carry on: 1239 / 800

Advancing to step 4:
When dividing 1239 by 800, we get 1 with a remainder of 439.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 439 after subtracting 800 from 1239.
Append the next digit (6) from the dividend to 439 and continue with: 4396 / 800

On to step 5:
4396 divided by 800 is 5 with a remainder of 396.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we subtract 4000 from 4396, we get 396.
Take the next digit (4) from the dividend and append it to 396, then repeat: 3964 / 800

Going ahead to step 6:
When dividing 3964 by 800, we get 4 with a remainder of 764.
Write down 4 as next digit of the result. 
Result so far: 154.0
Subtract 3200 from 3964 to get 764.
Grab the next digit (2) from the dividend, add it to 764, then carry on: 7642 / 800

Advancing to step 7:
7642 divided by 800 is 9 with a remainder of 442.
Write down 9 as next digit of the result. 
Result so far: 1549.0
Subtracting 7200 from 7642 leaves us with 442.
Bring next digit (0) of the dividend behind the 442 and repeat the process: 4420 / 800

Going ahead to step 8:
When dividing 4420 by 800, we get 5 with a remainder of 420.
The number 5 becomes the next digit in our result. 
Result so far: 15495.0
Deduct 4000 from 4420 and we're left with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Going ahead to step 9:
4200 divided by 800 is 5 with a remainder of 200.
Write down 5 as next digit of the result. 
Result so far: 15495.5
If we take 4000 away from 4200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 10:
800 can be fit into 2000 2 times, resulting in a remainder of 400.
Write down 2 as next digit of the result. 
Result so far: 15495.52
Subtracting 1600 from 2000 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 11:
The number 800 fits into 4000 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 15495.525
If we subtract 4000 from 4000, 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.

Going ahead to step 12:
If we divide 0 by 800, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 15495.525
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.

Let's proceed to step 13:
0 divided by 800 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 15495.525
Subtract 0 from 0 to 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.

The final outcome is 15495.525, with a leftover of 0.0.