25139823 ÷ 507 
We want to divide 25139823 by 507.

Advancing to step 1:
2 divided by 507 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 507

Advancing to step 2:
25 divided by 507 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Append the next digit (1) from the dividend to 25 and continue with: 251 / 507

Moving on to step 3:
The number 507 fits into 251 0 times, leaving a remainder of 251.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 251, we get 251.
Append the next digit (3) from the dividend to 251 and continue with: 2513 / 507

Let's proceed to step 4:
The number 507 fits into 2513 4 times, leaving a remainder of 485.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 485 after subtracting 2028 from 2513.
Grab the next digit (9) from the dividend, add it to 485, then carry on: 4859 / 507

Going ahead to step 5:
507 goes into 4859 9 times with a remainder of 296.
Write down 9 as next digit of the result. 
Result so far: 49.0
If we subtract 4563 from 4859, we get 296.
Grab the next digit (8) from the dividend, add it to 296, then carry on: 2968 / 507

Moving on to step 6:
When dividing 2968 by 507, we get 5 with a remainder of 433.
The next digit of our result is 5. 
Result so far: 495.0
Subtracting 2535 from 2968 leaves us with 433.
Bring next digit (2) of the dividend behind the 433 and repeat the process: 4332 / 507

Let's proceed to step 7:
When dividing 4332 by 507, we get 8 with a remainder of 276.
Use 8 as the next digit of our solution. 
Result so far: 4958.0
If we take 4056 away from 4332, we end up with 276.
Grab the next digit (3) from the dividend, add it to 276, then carry on: 2763 / 507

Moving on to step 8:
507 goes into 2763 5 times with a remainder of 228.
Put 5 as the next digit of the answer. 
Result so far: 49585.0
Subtracting 2535 from 2763 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 9:
2280 divided by 507 is 4 with a remainder of 252.
Write down 4 as next digit of the result. 
Result so far: 49585.4
The remainder is 252 after subtracting 2028 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Let's proceed to step 10:
If we divide 2520 by 507, we get 4 and a remainder of 492.
Write down 4 as next digit of the result. 
Result so far: 49585.44
Subtracting 2028 from 2520 leaves us with 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

The final outcome is 49585.44, with a leftover of 0.492.