Let's divide 391519 by 45
Our goal is to divide 391519 by 45.

Step 1:
45 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 45

Advancing to step 2:
When dividing 39 by 45, we get 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 45

Step 3:
391 divided by 45 is 8 with a remainder of 31.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 360 from 391 and we're left with 31.
Grab the next digit (5) from the dividend, add it to 31, then carry on: 315 / 45

Step 4:
45 goes into 315 7 times with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 87.0
Subtracting 315 from 315 leaves us with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 45

Moving on to step 5:
If we divide 1 by 45, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 870.0
Subtract 0 from 1 to get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 45

Advancing to step 6:
45 goes into 19 0 times with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 8700.0
If we subtract 0 from 19, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
When dividing 190 by 45, we get 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 8700.4
If we subtract 180 from 190, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
45 can be fit into 100 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 8700.42
If we subtract 90 from 100, we get 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:
45 goes into 100 2 times with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 8700.422
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 8700.422 with a remaining 0.001.