We look at the division of 821581 by 51 
We want to figure out the number of times 821581 can be divided by 51.

Moving on to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 51

Going ahead to step 2:
82 divided by 51 is 1 with a remainder of 31.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 51 from 82 leaves us with 31.
Include the next digit (1) from the dividend after 31, then repeat: 311 / 51

Let's proceed to step 3:
311 divided by 51 is 6 with a remainder of 5.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we take 306 away from 311, we end up with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 51

Let's proceed to step 4:
The number 51 fits into 55 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 161.0
Subtracting 51 from 55 leaves us with 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 51

Let's proceed to step 5:
51 goes into 48 0 times with a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 1610.0
Deduct 0 from 48 and we're left with 48.
Bring next digit (1) of the dividend behind the 48 and repeat the process: 481 / 51

Advancing to step 6:
51 goes into 481 9 times with a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 16109.0
If we take 459 away from 481, we end up with 22.
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:
When dividing 220 by 51, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 16109.4
If we take 204 away from 220, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
51 can be fit into 160 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 16109.43
Subtracting 153 from 160 leaves us 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.

On to step 9:
51 goes into 70 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 16109.431
Subtract 51 from 70 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
If we divide 190 by 51, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 16109.4313
If we take 153 away from 190, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 11:
370 divided by 51 is 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 16109.43137
Deduct 357 from 370 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.

Let's proceed to step 12:
If we divide 130 by 51, we get 2 and a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 16109.431372
Deduct 102 from 130 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 13:
51 can be fit into 280 5 times, resulting in a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 16109.4313725
The remainder is 25 after subtracting 255 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 14:
The number 51 fits into 250 4 times, leaving a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 16109.43137254
If we subtract 204 from 250, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

In conclusion, the division gives 16109.43137254 with a balance of 4.6e-08.