Let's divide 51191 by 2
We're looking to find how many times 2 goes into 51191.

Let's proceed to step 1:
2 can be fit into 5 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 4 from 5 leaves us with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 2

Moving on to step 2:
The number 2 fits into 11 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 25.0
If we subtract 10 from 11, we get 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 2

Moving on to step 3:
2 can be fit into 11 5 times, resulting in a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 255.0
The remainder is 1 after subtracting 10 from 11.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 2

Advancing to step 4:
19 divided by 2 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 2559.0
Deduct 18 from 19 and we're left with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 2

Moving on to step 5:
11 divided by 2 is 5 with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 25595.0
If we subtract 10 from 11, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 6:
When dividing 10 by 2, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 25595.5
If we subtract 10 from 10, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
2 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 25595.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
If we divide 0 by 2, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25595.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 25595.5 with a remaining 0.0.