Let's divide 86571531 by 3
We want to divide 86571531 by 3.

Going ahead to step 1:
When dividing 8 by 3, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
If we take 6 away from 8, we end up with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 3

Going ahead to step 2:
If we divide 26 by 3, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
The remainder is 2 after subtracting 24 from 26.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

Moving on to step 3:
25 divided by 3 is 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 288.0
The remainder is 1 after subtracting 24 from 25.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 3

Moving on to step 4:
3 can be fit into 17 5 times, resulting in a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 2885.0
Subtracting 15 from 17 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 3

Moving on to step 5:
3 goes into 21 7 times with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 28857.0
Subtracting 21 from 21 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 3

Step 6:
5 divided by 3 is 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 288571.0
Subtract 3 from 5 to get 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 3

On to step 7:
3 can be fit into 23 7 times, resulting in a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 2885717.0
Subtracting 21 from 23 leaves us with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 3

Moving on to step 8:
3 can be fit into 21 7 times, resulting in a remainder of 0.
The next digit of our result is 7. 
Result so far: 28857177.0
If we take 21 away from 21, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 28857177.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
When dividing 0 by 3, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 28857177.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 28857177.0 with a balance of 0.0.