81751821 divided by 16 
We want to figure out the number of times 81751821 can be divided by 16.

Going ahead to step 1:
16 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 16

Let's proceed to step 2:
16 can be fit into 81 5 times, resulting in a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 80 from 81 to get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 16

Moving on to step 3:
If we divide 17 by 16, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 51.0
Subtracting 16 from 17 leaves us with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 16

Going ahead to step 4:
16 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 510.0
Subtract 0 from 15 to get 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 16

Moving on to step 5:
The number 16 fits into 151 9 times, leaving a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 5109.0
Subtract 144 from 151 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 16

Going ahead to step 6:
16 goes into 78 4 times with a remainder of 14.
The next digit of our result is 4. 
Result so far: 51094.0
Subtracting 64 from 78 leaves us with 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 16

Going ahead to step 7:
When dividing 142 by 16, we get 8 with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 510948.0
If we take 128 away from 142, we end up with 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 16

Step 8:
16 can be fit into 141 8 times, resulting in a remainder of 13.
The next digit of our result is 8. 
Result so far: 5109488.0
If we take 128 away from 141, we end up 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.

Let's proceed to step 9:
When dividing 130 by 16, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 5109488.8
Deduct 128 from 130 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.

On to step 10:
When dividing 20 by 16, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 5109488.81
Deduct 16 from 20 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
If we divide 40 by 16, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 5109488.812
If we take 32 away from 40, 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.

Moving on to step 12:
16 goes into 80 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 5109488.8125
If we take 80 away from 80, 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.

Advancing to step 13:
When dividing 0 by 16, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5109488.8125
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.

Let's proceed to step 14:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5109488.8125
Subtract 0 from 0 to get 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 5109488.8125 with a balance of 0.0.