We look at the division of 91345399 by 815 
Our goal is to divide 91345399 by 815.

Moving on to step 1:
The number 815 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 815

Moving on to step 2:
If we divide 91 by 815, we get 0 and a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Append the next digit (3) from the dividend to 91 and continue with: 913 / 815

Moving on to step 3:
When dividing 913 by 815, we get 1 with a remainder of 98.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 815 from 913 and we're left with 98.
Append the next digit (4) from the dividend to 98 and continue with: 984 / 815

Advancing to step 4:
If we divide 984 by 815, we get 1 and a remainder of 169.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 169 after subtracting 815 from 984.
Grab the next digit (5) from the dividend, add it to 169, then carry on: 1695 / 815

Let's proceed to step 5:
1695 divided by 815 is 2 with a remainder of 65.
Use 2 as the next digit of our solution. 
Result so far: 112.0
Subtracting 1630 from 1695 leaves us with 65.
Fetch the next digit (3) from the dividend, attach it to 65 and continue: 653 / 815

Let's proceed to step 6:
The number 815 fits into 653 0 times, leaving a remainder of 653.
Record the quotient 0 as the next digit in the result. 
Result so far: 1120.0
The remainder is 653 after subtracting 0 from 653.
Bring next digit (9) of the dividend behind the 653 and repeat the process: 6539 / 815

Let's proceed to step 7:
When dividing 6539 by 815, we get 8 with a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 11208.0
Deduct 6520 from 6539 and we're left with 19.
Grab the next digit (9) from the dividend, add it to 19, then carry on: 199 / 815

On to step 8:
If we divide 199 by 815, we get 0 and a remainder of 199.
Put 0 as the next digit of the answer. 
Result so far: 112080.0
If we subtract 0 from 199, we get 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Let's proceed to step 9:
If we divide 1990 by 815, we get 2 and a remainder of 360.
Put 2 as the next digit of the answer. 
Result so far: 112080.2
If we subtract 1630 from 1990, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 10:
If we divide 3600 by 815, we get 4 and a remainder of 340.
Write down 4 as next digit of the result. 
Result so far: 112080.24
Deduct 3260 from 3600 and we're left with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 11:
815 can be fit into 3400 4 times, resulting in a remainder of 140.
Put 4 as the next digit of the answer. 
Result so far: 112080.244
If we subtract 3260 from 3400, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The quotient of the division is 112080.244, and the remainder is 0.014.