521043 ÷ 86 
We want to divide 521043 by 86.

Step 1:
If we divide 5 by 86, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 86

Let's proceed to step 2:
86 can be fit into 52 0 times, resulting in a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Grab the next digit (1) from the dividend, add it to 52, then carry on: 521 / 86

Step 3:
86 can be fit into 521 6 times, resulting in a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 516 away from 521, we end up with 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 86

Moving on to step 4:
86 goes into 50 0 times with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 60.0
Subtracting 0 from 50 leaves us with 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 86

On to step 5:
86 goes into 504 5 times with a remainder of 74.
The next digit of our result is 5. 
Result so far: 605.0
If we subtract 430 from 504, we get 74.
Grab the next digit (3) from the dividend, add it to 74, then carry on: 743 / 86

Let's proceed to step 6:
86 goes into 743 8 times with a remainder of 55.
The number 8 becomes the next digit in our result. 
Result so far: 6058.0
Deduct 688 from 743 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 7:
If we divide 550 by 86, we get 6 and a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 6058.6
Deduct 516 from 550 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
If we divide 340 by 86, we get 3 and a remainder of 82.
The number 3 becomes the next digit in our result. 
Result so far: 6058.63
Subtracting 258 from 340 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 9:
The number 86 fits into 820 9 times, leaving a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 6058.639
Subtracting 774 from 820 leaves us 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.

On to step 10:
The number 86 fits into 460 5 times, leaving a remainder of 30.
The next digit of our result is 5. 
Result so far: 6058.6395
Deduct 430 from 460 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
The number 86 fits into 300 3 times, leaving a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 6058.63953
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 12:
If we divide 420 by 86, we get 4 and a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 6058.639534
If we subtract 344 from 420, we 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.

Moving on to step 13:
760 divided by 86 is 8 with a remainder of 72.
Put 8 as the next digit of the answer. 
Result so far: 6058.6395348
Subtracting 688 from 760 leaves us 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.

Step 14:
The number 86 fits into 720 8 times, leaving a remainder of 32.
The next digit of our result is 8. 
Result so far: 6058.63953488
Deduct 688 from 720 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The quotient of the division is 6058.63953488, and the remainder is 3.2e-08.