15312677 divided by 800 
We want to divide 15312677 by 800.

Step 1:
800 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 800

Let's proceed to step 2:
15 divided by 800 is 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 800

Going ahead to step 3:
If we divide 153 by 800, we get 0 and a remainder of 153.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 153 leaves us with 153.
Fetch the next digit (1) from the dividend, attach it to 153 and continue: 1531 / 800

Moving on to step 4:
800 goes into 1531 1 times with a remainder of 731.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 800 from 1531 leaves us with 731.
Grab the next digit (2) from the dividend, add it to 731, then carry on: 7312 / 800

Advancing to step 5:
If we divide 7312 by 800, we get 9 and a remainder of 112.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtracting 7200 from 7312 leaves us with 112.
Fetch the next digit (6) from the dividend, attach it to 112 and continue: 1126 / 800

Step 6:
If we divide 1126 by 800, we get 1 and a remainder of 326.
The next digit of our result is 1. 
Result so far: 191.0
If we take 800 away from 1126, we end up with 326.
Include the next digit (7) from the dividend after 326, then repeat: 3267 / 800

Going ahead to step 7:
When dividing 3267 by 800, we get 4 with a remainder of 67.
Write down 4 as next digit of the result. 
Result so far: 1914.0
Subtract 3200 from 3267 to get 67.
Bring next digit (7) of the dividend behind the 67 and repeat the process: 677 / 800

Advancing to step 8:
The number 800 fits into 677 0 times, leaving a remainder of 677.
The number 0 becomes the next digit in our result. 
Result so far: 19140.0
Subtract 0 from 677 to get 677.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6770, and continue the process.

Moving on to step 9:
6770 divided by 800 is 8 with a remainder of 370.
Record the quotient 8 as the next digit in the result. 
Result so far: 19140.8
The remainder is 370 after subtracting 6400 from 6770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Let's proceed to step 10:
3700 divided by 800 is 4 with a remainder of 500.
The number 4 becomes the next digit in our result. 
Result so far: 19140.84
Subtracting 3200 from 3700 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 11:
When dividing 5000 by 800, we get 6 with a remainder of 200.
The next digit of our result is 6. 
Result so far: 19140.846
Subtracting 4800 from 5000 leaves us 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.

Advancing to step 12:
800 goes into 2000 2 times with a remainder of 400.
The next digit of our result is 2. 
Result so far: 19140.8462
If we take 1600 away from 2000, we end up 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 13:
The number 800 fits into 4000 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 19140.84625
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.

Advancing to step 14:
0 divided by 800 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 19140.84625
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.

Moving on to step 15:
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: 19140.84625
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 19140.84625, with a leftover of 0.0.