51234939 divided by 449 
We want to divide 51234939 by 449.

On to step 1:
If we divide 5 by 449, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 449

Step 2:
449 can be fit into 51 0 times, resulting in a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Fetch the next digit (2) from the dividend, attach it to 51 and continue: 512 / 449

Step 3:
The number 449 fits into 512 1 times, leaving a remainder of 63.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 449 from 512 to get 63.
Fetch the next digit (3) from the dividend, attach it to 63 and continue: 633 / 449

Let's proceed to step 4:
If we divide 633 by 449, we get 1 and a remainder of 184.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 449 from 633 to get 184.
Take the next digit (4) from the dividend and append it to 184, then repeat: 1844 / 449

Advancing to step 5:
449 can be fit into 1844 4 times, resulting in a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 114.0
Subtracting 1796 from 1844 leaves us with 48.
Include the next digit (9) from the dividend after 48, then repeat: 489 / 449

On to step 6:
449 goes into 489 1 times with a remainder of 40.
The number 1 becomes the next digit in our result. 
Result so far: 1141.0
If we take 449 away from 489, we end up with 40.
Take the next digit (3) from the dividend and append it to 40, then repeat: 403 / 449

Advancing to step 7:
449 goes into 403 0 times with a remainder of 403.
The number 0 becomes the next digit in our result. 
Result so far: 11410.0
Subtract 0 from 403 to get 403.
Grab the next digit (9) from the dividend, add it to 403, then carry on: 4039 / 449

Going ahead to step 8:
449 goes into 4039 8 times with a remainder of 447.
The next digit of our result is 8. 
Result so far: 114108.0
If we subtract 3592 from 4039, we get 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Advancing to step 9:
4470 divided by 449 is 9 with a remainder of 429.
Use 9 as the next digit of our solution. 
Result so far: 114108.9
If we subtract 4041 from 4470, we get 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

Let's proceed to step 10:
The number 449 fits into 4290 9 times, leaving a remainder of 249.
The number 9 becomes the next digit in our result. 
Result so far: 114108.99
Subtract 4041 from 4290 to get 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

The final outcome is 114108.99, with a leftover of 0.249.