We look at the division of 512349 by 51 
We want to figure out the number of times 512349 can be divided by 51.

Moving on to step 1:
51 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 51

Advancing to step 2:
51 divided by 51 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 0 after subtracting 51 from 51.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 51

Moving on to step 3:
51 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 51

Moving on to step 4:
The number 51 fits into 23 0 times, leaving a remainder of 23.
Put 0 as the next digit of the answer. 
Result so far: 100.0
Subtract 0 from 23 to get 23.
Include the next digit (4) from the dividend after 23, then repeat: 234 / 51

Let's proceed to step 5:
51 can be fit into 234 4 times, resulting in a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 1004.0
Deduct 204 from 234 and we're left with 30.
Fetch the next digit (9) from the dividend, attach it to 30 and continue: 309 / 51

Let's proceed to step 6:
51 can be fit into 309 6 times, resulting in a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 10046.0
Subtracting 306 from 309 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
When dividing 30 by 51, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 10046.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
The number 51 fits into 300 5 times, leaving a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 10046.05
Deduct 255 from 300 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 9:
51 goes into 450 8 times with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 10046.058
If we subtract 408 from 450, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 10:
51 can be fit into 420 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 10046.0588
If we take 408 away from 420, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 10046.0588 with a remaining 0.00012.