We look at the division of 815992 by 51 
We want to figure out the number of times 815992 can be divided by 51.

Going ahead to step 1:
If we divide 8 by 51, we get 0 and 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.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 51

Moving on to step 2:
The number 51 fits into 81 1 times, leaving a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 51 away from 81, we end up with 30.
Take the next digit (5) from the dividend and append it to 30, then repeat: 305 / 51

Step 3:
51 can be fit into 305 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 255 away from 305, we end up with 50.
Bring next digit (9) of the dividend behind the 50 and repeat the process: 509 / 51

Moving on to step 4:
51 can be fit into 509 9 times, resulting in a remainder of 50.
Put 9 as the next digit of the answer. 
Result so far: 159.0
Subtract 459 from 509 to get 50.
Fetch the next digit (9) from the dividend, attach it to 50 and continue: 509 / 51

Going ahead to step 5:
When dividing 509 by 51, we get 9 with a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 1599.0
Subtracting 459 from 509 leaves us with 50.
Take the next digit (2) from the dividend and append it to 50, then repeat: 502 / 51

Moving on to step 6:
If we divide 502 by 51, we get 9 and a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 15999.0
Subtract 459 from 502 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
51 goes into 430 8 times with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 15999.8
If we take 408 away from 430, 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.

Step 8:
If we divide 220 by 51, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 15999.84
Subtract 204 from 220 to get 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 9:
When dividing 160 by 51, we get 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 15999.843
Subtract 153 from 160 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 10:
70 divided by 51 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 15999.8431
Deduct 51 from 70 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 11:
51 goes into 190 3 times with a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 15999.84313
Subtracting 153 from 190 leaves us 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.

On to step 12:
If we divide 370 by 51, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 15999.843137
If we take 357 away from 370, 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 13:
The number 51 fits into 130 2 times, leaving a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 15999.8431372
The remainder is 28 after subtracting 102 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 14:
51 goes into 280 5 times with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 15999.84313725
Deduct 255 from 280 and we're left 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.

The final result is 15999.84313725 with a remainder of 2.5e-08.