487639 ÷ 86 
Our goal is to divide 487639 by 86.

Let's proceed to step 1:
86 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 86

Going ahead to step 2:
When dividing 48 by 86, we get 0 with a remainder of 48.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 48 and we're left with 48.
Bring next digit (7) of the dividend behind the 48 and repeat the process: 487 / 86

On to step 3:
If we divide 487 by 86, we get 5 and a remainder of 57.
The next digit of our result is 5. 
Result so far: 5.0
If we take 430 away from 487, we end up with 57.
Fetch the next digit (6) from the dividend, attach it to 57 and continue: 576 / 86

Going ahead to step 4:
The number 86 fits into 576 6 times, leaving a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 56.0
The remainder is 60 after subtracting 516 from 576.
Fetch the next digit (3) from the dividend, attach it to 60 and continue: 603 / 86

Let's proceed to step 5:
603 divided by 86 is 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 567.0
Deduct 602 from 603 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 86

Step 6:
The number 86 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 5670.0
If we subtract 0 from 19, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
86 can be fit into 190 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 5670.2
Subtract 172 from 190 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
180 divided by 86 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 5670.22
If we take 172 away from 180, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 5670.22, and the remainder is 0.008.