We're dividing 453259 by 86 
We want to figure out the number of times 453259 can be divided by 86.

On 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.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 86

Step 2:
45 divided by 86 is 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Bring next digit (3) of the dividend behind the 45 and repeat the process: 453 / 86

Step 3:
453 divided by 86 is 5 with a remainder of 23.
The next digit of our result is 5. 
Result so far: 5.0
If we take 430 away from 453, we end up with 23.
Bring next digit (2) of the dividend behind the 23 and repeat the process: 232 / 86

Going ahead to step 4:
86 goes into 232 2 times with a remainder of 60.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
If we take 172 away from 232, we end up with 60.
Append the next digit (5) from the dividend to 60 and continue with: 605 / 86

Going ahead to step 5:
86 can be fit into 605 7 times, resulting in a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 527.0
Subtracting 602 from 605 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 86

Moving on to step 6:
If we divide 39 by 86, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 5270.0
Deduct 0 from 39 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 7:
86 can be fit into 390 4 times, resulting in a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 5270.4
If we take 344 away from 390, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 8:
If we divide 460 by 86, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 5270.45
The remainder is 30 after subtracting 430 from 460.
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 9:
The number 86 fits into 300 3 times, leaving a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 5270.453
If we take 258 away from 300, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
When dividing 420 by 86, we get 4 with a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 5270.4534
Subtract 344 from 420 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 11:
If we divide 760 by 86, we get 8 and a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 5270.45348
If we take 688 away from 760, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 12:
86 goes into 720 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 5270.453488
Subtract 688 from 720 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 5270.453488 and a remainder of 3.2e-06.