We're dividing 521717 by 86 
Let's see how many times 86 fits into 521717.

Going ahead to step 1:
When dividing 5 by 86, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 86

Advancing to step 2:
The number 86 fits into 52 0 times, leaving a remainder of 52.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Bring next digit (1) of the dividend behind the 52 and repeat the process: 521 / 86

Step 3:
If we divide 521 by 86, we get 6 and a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 516 from 521 to get 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 86

Step 4:
When dividing 57 by 86, we get 0 with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 60.0
Subtract 0 from 57 to get 57.
Grab the next digit (1) from the dividend, add it to 57, then carry on: 571 / 86

On to step 5:
When dividing 571 by 86, we get 6 with a remainder of 55.
The number 6 becomes the next digit in our result. 
Result so far: 606.0
If we take 516 away from 571, we end up with 55.
Include the next digit (7) from the dividend after 55, then repeat: 557 / 86

On to step 6:
86 can be fit into 557 6 times, resulting in a remainder of 41.
The number 6 becomes the next digit in our result. 
Result so far: 6066.0
The remainder is 41 after subtracting 516 from 557.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 7:
410 divided by 86 is 4 with a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 6066.4
Subtract 344 from 410 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 8:
86 can be fit into 660 7 times, resulting in a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 6066.47
Subtract 602 from 660 to get 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 9:
86 can be fit into 580 6 times, resulting in a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 6066.476
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.

On to step 10:
If we divide 640 by 86, we get 7 and a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 6066.4767
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 11:
When dividing 380 by 86, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 6066.47674
If we subtract 344 from 380, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 12:
The number 86 fits into 360 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 6066.476744
If we take 344 away from 360, we end up with 16.
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 6066.476744 with a remaining 1.6e-06.