We look at the division of 805215 by 90 
Let's see how many times 90 fits into 805215.

On to step 1:
90 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 90

Moving on to step 2:
When dividing 80 by 90, we get 0 with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Bring next digit (5) of the dividend behind the 80 and repeat the process: 805 / 90

On to step 3:
When dividing 805 by 90, we get 8 with a remainder of 85.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 720 from 805, we get 85.
Bring next digit (2) of the dividend behind the 85 and repeat the process: 852 / 90

On to step 4:
90 goes into 852 9 times with a remainder of 42.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
If we subtract 810 from 852, we get 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 90

Going ahead to step 5:
90 can be fit into 421 4 times, resulting in a remainder of 61.
Use 4 as the next digit of our solution. 
Result so far: 894.0
Deduct 360 from 421 and we're left with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 90

Let's proceed to step 6:
When dividing 615 by 90, we get 6 with a remainder of 75.
Put 6 as the next digit of the answer. 
Result so far: 8946.0
Deduct 540 from 615 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 7:
The number 90 fits into 750 8 times, leaving a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 8946.8
The remainder is 30 after subtracting 720 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 8946.83
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 8946.833
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 8946.833 with a remainder of 0.003.