We look at the division of 815450 by 51 
Let's see how many times 51 fits into 815450.

Advancing to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 51

On to step 2:
The number 51 fits into 81 1 times, leaving a remainder of 30.
Put 1 as the next digit of the answer. 
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

Let's proceed to step 3:
51 can be fit into 305 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 255 from 305 and we're left with 50.
Grab the next digit (4) from the dividend, add it to 50, then carry on: 504 / 51

Going ahead to step 4:
51 goes into 504 9 times with a remainder of 45.
The next digit of our result is 9. 
Result so far: 159.0
The remainder is 45 after subtracting 459 from 504.
Take the next digit (5) from the dividend and append it to 45, then repeat: 455 / 51

On to step 5:
The number 51 fits into 455 8 times, leaving a remainder of 47.
The number 8 becomes the next digit in our result. 
Result so far: 1598.0
Subtracting 408 from 455 leaves us with 47.
Append the next digit (0) from the dividend to 47 and continue with: 470 / 51

Step 6:
51 can be fit into 470 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 15989.0
Deduct 459 from 470 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
51 goes into 110 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 15989.2
The remainder is 8 after subtracting 102 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
If we divide 80 by 51, we get 1 and a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 15989.21
If we subtract 51 from 80, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 9:
51 goes into 290 5 times with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 15989.215
Subtracting 255 from 290 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 10:
51 goes into 350 6 times with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 15989.2156
Subtracting 306 from 350 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 11:
51 can be fit into 440 8 times, resulting in a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 15989.21568
If we take 408 away from 440, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
If we divide 320 by 51, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 15989.215686
The remainder is 14 after subtracting 306 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 13:
When dividing 140 by 51, we get 2 with a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 15989.2156862
The remainder is 38 after subtracting 102 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 14:
When dividing 380 by 51, we get 7 with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 15989.21568627
Subtracting 357 from 380 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

After the division, we end up with 15989.21568627 and a remainder of 2.3e-08.