16555138 divided by 81 
We're looking to find how many times 81 goes into 16555138.

Going ahead to step 1:
81 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 81

Advancing to step 2:
When dividing 16 by 81, we get 0 with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 16, we get 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 81

Going ahead to step 3:
81 goes into 165 2 times with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 162 from 165 leaves us with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 81

Going ahead to step 4:
81 goes into 35 0 times with a remainder of 35.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtract 0 from 35 to get 35.
Include the next digit (5) from the dividend after 35, then repeat: 355 / 81

Step 5:
When dividing 355 by 81, we get 4 with a remainder of 31.
Record the quotient 4 as the next digit in the result. 
Result so far: 204.0
If we take 324 away from 355, we end up with 31.
Fetch the next digit (1) from the dividend, attach it to 31 and continue: 311 / 81

Step 6:
81 goes into 311 3 times with a remainder of 68.
Put 3 as the next digit of the answer. 
Result so far: 2043.0
Subtract 243 from 311 to get 68.
Append the next digit (3) from the dividend to 68 and continue with: 683 / 81

Going ahead to step 7:
81 can be fit into 683 8 times, resulting in a remainder of 35.
The next digit of our result is 8. 
Result so far: 20438.0
Subtract 648 from 683 to get 35.
Include the next digit (8) from the dividend after 35, then repeat: 358 / 81

Advancing to step 8:
When dividing 358 by 81, we get 4 with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 204384.0
The remainder is 34 after subtracting 324 from 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 9:
When dividing 340 by 81, we get 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 204384.4
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
81 can be fit into 160 1 times, resulting in a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 204384.41
If we take 81 away from 160, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 11:
If we divide 790 by 81, we get 9 and a remainder of 61.
Use 9 as the next digit of our solution. 
Result so far: 204384.419
Subtract 729 from 790 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 12:
610 divided by 81 is 7 with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 204384.4197
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 13:
When dividing 430 by 81, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 204384.41975
Subtracting 405 from 430 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 14:
250 divided by 81 is 3 with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 204384.419753
Deduct 243 from 250 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 15:
When dividing 70 by 81, we get 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 204384.419753
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 16:
81 goes into 700 8 times with a remainder of 52.
The next digit of our result is 8. 
Result so far: 204384.41975308
If we subtract 648 from 700, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 204384.41975308, with a leftover of 5.2e-08.