645135 divided by 86 
Let's see how many times 86 fits into 645135.

On to step 1:
When dividing 6 by 86, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 86

Moving on to step 2:
When dividing 64 by 86, we get 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 86

Let's proceed to step 3:
86 can be fit into 645 7 times, resulting in a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 602 away from 645, we end up with 43.
Fetch the next digit (1) from the dividend, attach it to 43 and continue: 431 / 86

Going ahead to step 4:
When dividing 431 by 86, we get 5 with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 75.0
Subtract 430 from 431 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 86

Going ahead to step 5:
When dividing 13 by 86, we get 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 750.0
If we take 0 away from 13, we end up with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 86

On to step 6:
If we divide 135 by 86, we get 1 and a remainder of 49.
The next digit of our result is 1. 
Result so far: 7501.0
If we subtract 86 from 135, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 7:
86 can be fit into 490 5 times, resulting in a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 7501.5
If we subtract 430 from 490, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
The number 86 fits into 600 6 times, leaving a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 7501.56
If we subtract 516 from 600, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
86 goes into 840 9 times with a remainder of 66.
Use 9 as the next digit of our solution. 
Result so far: 7501.569
If we take 774 away from 840, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 10:
86 can be fit into 660 7 times, resulting in a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 7501.5697
Deduct 602 from 660 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 11:
The number 86 fits into 580 6 times, leaving a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 7501.56976
Subtract 516 from 580 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 12:
86 can be fit into 640 7 times, resulting in a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 7501.569767
The remainder is 38 after subtracting 602 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 13:
380 divided by 86 is 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 7501.5697674
If we take 344 away from 380, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 14:
86 can be fit into 360 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 7501.56976744
The remainder is 16 after subtracting 344 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 7501.56976744 with a remaining 1.6e-08.