We divide 815411 by 51
We're looking to find how many times 51 goes into 815411.

Step 1:
When dividing 8 by 51, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 51

Advancing to step 2:
If we divide 81 by 51, we get 1 and a remainder of 30.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 30 after subtracting 51 from 81.
Bring next digit (5) of the dividend behind the 30 and repeat the process: 305 / 51

Advancing to step 3:
If we divide 305 by 51, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 15.0
If we take 255 away from 305, we end up with 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 51

Going ahead to step 4:
51 can be fit into 504 9 times, resulting in a remainder of 45.
Record the quotient 9 as the next digit in the result. 
Result so far: 159.0
If we subtract 459 from 504, we get 45.
Include the next digit (1) from the dividend after 45, then repeat: 451 / 51

Let's proceed to step 5:
51 goes into 451 8 times with a remainder of 43.
Use 8 as the next digit of our solution. 
Result so far: 1598.0
Deduct 408 from 451 and we're left with 43.
Take the next digit (1) from the dividend and append it to 43, then repeat: 431 / 51

Step 6:
If we divide 431 by 51, we get 8 and a remainder of 23.
The number 8 becomes the next digit in our result. 
Result so far: 15988.0
The remainder is 23 after subtracting 408 from 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 7:
The number 51 fits into 230 4 times, leaving a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 15988.4
If we take 204 away from 230, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 8:
When dividing 260 by 51, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 15988.45
If we take 255 away from 260, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
If we divide 50 by 51, we get 0 and a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 15988.45
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 10:
When dividing 500 by 51, we get 9 with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 15988.4509
Deduct 459 from 500 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 11:
410 divided by 51 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 15988.45098
If we subtract 408 from 410, we 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.

Step 12:
51 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 15988.45098
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 13:
If we divide 200 by 51, we get 3 and a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 15988.4509803
Subtract 153 from 200 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 14:
51 goes into 470 9 times with a remainder of 11.
The next digit of our result is 9. 
Result so far: 15988.45098039
If we subtract 459 from 470, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

After the division, we end up with 15988.45098039 and a remainder of 1.1e-08.