We divide 42916 by 81
We want to figure out the number of times 42916 can be divided by 81.

Let's proceed to step 1:
81 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 81

Advancing to step 2:
If we divide 42 by 81, we get 0 and a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (9) from the dividend after 42, then repeat: 429 / 81

Step 3:
If we divide 429 by 81, we get 5 and a remainder of 24.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 405 from 429 leaves us with 24.
Take the next digit (1) from the dividend and append it to 24, then repeat: 241 / 81

Advancing to step 4:
When dividing 241 by 81, we get 2 with a remainder of 79.
Put 2 as the next digit of the answer. 
Result so far: 52.0
If we take 162 away from 241, we end up with 79.
Take the next digit (6) from the dividend and append it to 79, then repeat: 796 / 81

On to step 5:
When dividing 796 by 81, we get 9 with a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 529.0
The remainder is 67 after subtracting 729 from 796.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 6:
81 can be fit into 670 8 times, resulting in a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 529.8
The remainder is 22 after subtracting 648 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
The number 81 fits into 220 2 times, leaving a remainder of 58.
Put 2 as the next digit of the answer. 
Result so far: 529.82
The remainder is 58 after subtracting 162 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 8:
81 goes into 580 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 529.827
Deduct 567 from 580 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
When dividing 130 by 81, we get 1 with a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 529.8271
If we take 81 away from 130, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 10:
The number 81 fits into 490 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 529.82716
Subtract 486 from 490 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
When dividing 40 by 81, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 529.82716
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 529.8271604
If we take 324 away from 400, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 13:
760 divided by 81 is 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 529.82716049
If we subtract 729 from 760, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final result is 529.82716049 with a remainder of 3.1e-08.