We look at the division of 453285 by 86 
We want to figure out the number of times 453285 can be divided by 86.

Advancing to step 1:
The number 86 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 86

On to step 2:
45 divided by 86 is 0 with a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Take the next digit (3) from the dividend and append it to 45, then repeat: 453 / 86

On to step 3:
86 goes into 453 5 times with a remainder of 23.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 430 from 453 and we're left with 23.
Fetch the next digit (2) from the dividend, attach it to 23 and continue: 232 / 86

Moving on to step 4:
When dividing 232 by 86, we get 2 with a remainder of 60.
The next digit of our result is 2. 
Result so far: 52.0
If we subtract 172 from 232, we get 60.
Bring next digit (8) of the dividend behind the 60 and repeat the process: 608 / 86

Let's proceed to step 5:
86 goes into 608 7 times with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 527.0
If we take 602 away from 608, we end up with 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 86

Let's proceed to step 6:
65 divided by 86 is 0 with a remainder of 65.
The next digit of our result is 0. 
Result so far: 5270.0
Subtract 0 from 65 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 7:
650 divided by 86 is 7 with a remainder of 48.
The next digit of our result is 7. 
Result so far: 5270.7
The remainder is 48 after subtracting 602 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 8:
The number 86 fits into 480 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 5270.75
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
When dividing 500 by 86, we get 5 with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 5270.755
If we subtract 430 from 500, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Our division results in 5270.755 with a remaining 0.007.