We're dividing 81859897 by 804 
Let's see how many times 804 fits into 81859897.

Step 1:
If we divide 8 by 804, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 804

On to step 2:
81 divided by 804 is 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Include the next digit (8) from the dividend after 81, then repeat: 818 / 804

Advancing to step 3:
804 can be fit into 818 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 804 from 818 and we're left with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 804

On to step 4:
804 can be fit into 145 0 times, resulting in a remainder of 145.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtract 0 from 145 to get 145.
Bring next digit (9) of the dividend behind the 145 and repeat the process: 1459 / 804

Let's proceed to step 5:
1459 divided by 804 is 1 with a remainder of 655.
Use 1 as the next digit of our solution. 
Result so far: 101.0
If we subtract 804 from 1459, we get 655.
Append the next digit (8) from the dividend to 655 and continue with: 6558 / 804

Let's proceed to step 6:
When dividing 6558 by 804, we get 8 with a remainder of 126.
The next digit of our result is 8. 
Result so far: 1018.0
Subtracting 6432 from 6558 leaves us with 126.
Fetch the next digit (9) from the dividend, attach it to 126 and continue: 1269 / 804

Going ahead to step 7:
The number 804 fits into 1269 1 times, leaving a remainder of 465.
The next digit of our result is 1. 
Result so far: 10181.0
If we take 804 away from 1269, we end up with 465.
Bring next digit (7) of the dividend behind the 465 and repeat the process: 4657 / 804

Step 8:
4657 divided by 804 is 5 with a remainder of 637.
Use 5 as the next digit of our solution. 
Result so far: 101815.0
If we subtract 4020 from 4657, we get 637.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6370, and continue the process.

Moving on to step 9:
6370 divided by 804 is 7 with a remainder of 742.
Use 7 as the next digit of our solution. 
Result so far: 101815.7
If we take 5628 away from 6370, we end up with 742.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7420, and continue the process.

Moving on to step 10:
7420 divided by 804 is 9 with a remainder of 184.
The next digit of our result is 9. 
Result so far: 101815.79
The remainder is 184 after subtracting 7236 from 7420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Moving on to step 11:
804 can be fit into 1840 2 times, resulting in a remainder of 232.
Write down 2 as next digit of the result. 
Result so far: 101815.792
If we subtract 1608 from 1840, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Advancing to step 12:
The number 804 fits into 2320 2 times, leaving a remainder of 712.
Put 2 as the next digit of the answer. 
Result so far: 101815.7922
Subtract 1608 from 2320 to get 712.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7120, and continue the process.

Our division results in 101815.7922 with a remaining 0.00712.