We look at the division of 815225 by 51 
Our goal is to divide 815225 by 51.

Moving on to 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
If we take 0 away from 8, we end up with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 51

Step 2:
51 can be fit into 81 1 times, resulting in a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
If we take 51 away from 81, we end up with 30.
Grab the next digit (5) from the dividend, add it to 30, then carry on: 305 / 51

Step 3:
305 divided by 51 is 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 15.0
Deduct 255 from 305 and we're left with 50.
Bring next digit (2) of the dividend behind the 50 and repeat the process: 502 / 51

Moving on to step 4:
The number 51 fits into 502 9 times, leaving a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 159.0
The remainder is 43 after subtracting 459 from 502.
Take the next digit (2) from the dividend and append it to 43, then repeat: 432 / 51

Advancing to step 5:
If we divide 432 by 51, we get 8 and a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 1598.0
The remainder is 24 after subtracting 408 from 432.
Grab the next digit (5) from the dividend, add it to 24, then carry on: 245 / 51

On to step 6:
51 can be fit into 245 4 times, resulting in a remainder of 41.
The next digit of our result is 4. 
Result so far: 15984.0
If we take 204 away from 245, we end up 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.

Going ahead to step 7:
410 divided by 51 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 15984.8
If we take 408 away from 410, we end up 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.

Moving on to step 8:
The number 51 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 15984.8
If we take 0 away from 20, we end up 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.

Step 9:
51 goes into 200 3 times with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 15984.803
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.

Step 10:
51 can be fit into 470 9 times, resulting in a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 15984.8039
Subtract 459 from 470 to 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.

Step 11:
110 divided by 51 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 15984.80392
If we subtract 102 from 110, we get 8.
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 12:
51 can be fit into 80 1 times, resulting in a remainder of 29.
The next digit of our result is 1. 
Result so far: 15984.803921
Subtracting 51 from 80 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 13:
290 divided by 51 is 5 with a remainder of 35.
The next digit of our result is 5. 
Result so far: 15984.8039215
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.

Going ahead to step 14:
When dividing 350 by 51, we get 6 with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 15984.80392156
Deduct 306 from 350 and we're left 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.

Our division results in 15984.80392156 with a remaining 4.4e-08.