We're dividing 12578783 by 249 
We want to figure out the number of times 12578783 can be divided by 249.

Let's proceed to step 1:
When dividing 1 by 249, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 249

On to step 2:
12 divided by 249 is 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 249

Advancing to step 3:
The number 249 fits into 125 0 times, leaving a remainder of 125.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 125 and we're left with 125.
Grab the next digit (7) from the dividend, add it to 125, then carry on: 1257 / 249

Let's proceed to step 4:
The number 249 fits into 1257 5 times, leaving a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 12 after subtracting 1245 from 1257.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 249

Step 5:
When dividing 128 by 249, we get 0 with a remainder of 128.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
Subtract 0 from 128 to get 128.
Take the next digit (7) from the dividend and append it to 128, then repeat: 1287 / 249

Going ahead to step 6:
When dividing 1287 by 249, we get 5 with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 505.0
Deduct 1245 from 1287 and we're left with 42.
Append the next digit (8) from the dividend to 42 and continue with: 428 / 249

Advancing to step 7:
When dividing 428 by 249, we get 1 with a remainder of 179.
Put 1 as the next digit of the answer. 
Result so far: 5051.0
Subtracting 249 from 428 leaves us with 179.
Bring next digit (3) of the dividend behind the 179 and repeat the process: 1793 / 249

Moving on to step 8:
249 goes into 1793 7 times with a remainder of 50.
Put 7 as the next digit of the answer. 
Result so far: 50517.0
Subtracting 1743 from 1793 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
When dividing 500 by 249, we get 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 50517.2
Subtract 498 from 500 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
If we divide 20 by 249, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 50517.2
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
When dividing 200 by 249, we get 0 with a remainder of 200.
The next digit of our result is 0. 
Result so far: 50517.2
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 50517.2, with a leftover of 0.02.