We look at the division of 831225 by 45 
Our goal is to divide 831225 by 45.

Let's proceed to step 1:
45 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 45

Let's proceed to step 2:
If we divide 83 by 45, we get 1 and a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 45 from 83 to get 38.
Grab the next digit (1) from the dividend, add it to 38, then carry on: 381 / 45

Let's proceed to step 3:
When dividing 381 by 45, we get 8 with a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we subtract 360 from 381, we get 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 45

Let's proceed to step 4:
45 can be fit into 212 4 times, resulting in a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 184.0
If we subtract 180 from 212, we get 32.
Fetch the next digit (2) from the dividend, attach it to 32 and continue: 322 / 45

Advancing to step 5:
45 can be fit into 322 7 times, resulting in a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 1847.0
Subtracting 315 from 322 leaves us with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 45

Moving on to step 6:
If we divide 75 by 45, we get 1 and a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 18471.0
Subtract 45 from 75 to 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.

Advancing to step 7:
300 divided by 45 is 6 with a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 18471.6
Deduct 270 from 300 and we're left 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.

Moving on to step 8:
45 can be fit into 300 6 times, resulting in a remainder of 30.
The next digit of our result is 6. 
Result so far: 18471.66
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 18471.66 with a remainder of 0.03.