We look at the division of 51128078 by 809 
Let's see how many times 809 fits into 51128078.

On to step 1:
5 divided by 809 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 809

Going ahead to step 2:
809 can be fit into 51 0 times, resulting in a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 809

Going ahead to step 3:
When dividing 511 by 809, we get 0 with a remainder of 511.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 511 and we're left with 511.
Take the next digit (2) from the dividend and append it to 511, then repeat: 5112 / 809

Advancing to step 4:
If we divide 5112 by 809, we get 6 and a remainder of 258.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 4854 from 5112 and we're left with 258.
Bring next digit (8) of the dividend behind the 258 and repeat the process: 2588 / 809

Advancing to step 5:
809 can be fit into 2588 3 times, resulting in a remainder of 161.
The next digit of our result is 3. 
Result so far: 63.0
Deduct 2427 from 2588 and we're left with 161.
Grab the next digit (0) from the dividend, add it to 161, then carry on: 1610 / 809

On to step 6:
809 can be fit into 1610 1 times, resulting in a remainder of 801.
Put 1 as the next digit of the answer. 
Result so far: 631.0
Subtract 809 from 1610 to get 801.
Fetch the next digit (7) from the dividend, attach it to 801 and continue: 8017 / 809

Moving on to step 7:
8017 divided by 809 is 9 with a remainder of 736.
Write down 9 as next digit of the result. 
Result so far: 6319.0
Subtract 7281 from 8017 to get 736.
Append the next digit (8) from the dividend to 736 and continue with: 7368 / 809

Going ahead to step 8:
809 goes into 7368 9 times with a remainder of 87.
Use 9 as the next digit of our solution. 
Result so far: 63199.0
The remainder is 87 after subtracting 7281 from 7368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 9:
If we divide 870 by 809, we get 1 and a remainder of 61.
The next digit of our result is 1. 
Result so far: 63199.1
If we take 809 away from 870, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 10:
809 goes into 610 0 times with a remainder of 610.
The number 0 becomes the next digit in our result. 
Result so far: 63199.1
Subtract 0 from 610 to get 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Going ahead to step 11:
809 can be fit into 6100 7 times, resulting in a remainder of 437.
The next digit of our result is 7. 
Result so far: 63199.107
Subtracting 5663 from 6100 leaves us with 437.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4370, and continue the process.

Step 12:
When dividing 4370 by 809, we get 5 with a remainder of 325.
The next digit of our result is 5. 
Result so far: 63199.1075
The remainder is 325 after subtracting 4045 from 4370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Step 13:
If we divide 3250 by 809, we get 4 and a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 63199.10754
Subtract 3236 from 3250 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 14:
If we divide 140 by 809, we get 0 and a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 63199.10754
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 15:
When dividing 1400 by 809, we get 1 with a remainder of 591.
The number 1 becomes the next digit in our result. 
Result so far: 63199.1075401
If we take 809 away from 1400, we end up with 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Let's proceed to step 16:
The number 809 fits into 5910 7 times, leaving a remainder of 247.
The next digit of our result is 7. 
Result so far: 63199.10754017
Subtract 5663 from 5910 to get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

In conclusion, the division gives 63199.10754017 with a balance of 2.47e-07.