We divide 81087866 by 3
We want to figure out the number of times 81087866 can be divided by 3.

Going ahead to step 1:
3 goes into 8 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 6 from 8, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 3

Advancing to step 2:
The number 3 fits into 21 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 27.0
Deduct 21 from 21 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 3

Step 3:
When dividing 0 by 3, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 270.0
If we take 0 away from 0, we end up with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 3

Step 4:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2702.0
Subtract 6 from 8 to get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 3

Advancing to step 5:
The number 3 fits into 27 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 27029.0
If we subtract 27 from 27, we get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 3

Step 6:
3 goes into 8 2 times with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 270292.0
If we subtract 6 from 8, we get 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 3

Let's proceed to step 7:
When dividing 26 by 3, we get 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 2702928.0
Deduct 24 from 26 and we're left with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 3

Let's proceed to step 8:
If we divide 26 by 3, we get 8 and a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 27029288.0
If we take 24 away from 26, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
3 goes into 20 6 times with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 27029288.6
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 27029288.66
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 27029288.66 with a remaining 0.002.