Let's divide 811807 by 15
We're looking to find how many times 15 goes into 811807.

Step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 15

Moving on to step 2:
15 can be fit into 81 5 times, resulting in a remainder of 6.
The next digit of our result is 5. 
Result so far: 5.0
The remainder is 6 after subtracting 75 from 81.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 15

Moving on to step 3:
61 divided by 15 is 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
Deduct 60 from 61 and we're left with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 15

Going ahead to step 4:
15 goes into 18 1 times with a remainder of 3.
The next digit of our result is 1. 
Result so far: 541.0
Deduct 15 from 18 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 15

Advancing to step 5:
The number 15 fits into 30 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 5412.0
If we take 30 away from 30, we end up with 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 15

Let's proceed to step 6:
When dividing 7 by 15, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 54120.0
The remainder is 7 after subtracting 0 from 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
When dividing 70 by 15, we get 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 54120.4
Subtracting 60 from 70 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
100 divided by 15 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 54120.46
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
15 goes into 100 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 54120.466
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 54120.466, with a leftover of 0.001.