We divide 51180431 by 249
We want to figure out the number of times 51180431 can be divided by 249.

Step 1:
5 divided by 249 is 0 with 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.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 249

Step 2:
The number 249 fits into 51 0 times, leaving a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 249

On to step 3:
If we divide 511 by 249, we get 2 and a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 498 from 511 and we're left with 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 249

Step 4:
249 can be fit into 138 0 times, resulting in a remainder of 138.
Write down 0 as next digit of the result. 
Result so far: 20.0
The remainder is 138 after subtracting 0 from 138.
Include the next digit (0) from the dividend after 138, then repeat: 1380 / 249

Going ahead to step 5:
1380 divided by 249 is 5 with a remainder of 135.
The next digit of our result is 5. 
Result so far: 205.0
If we take 1245 away from 1380, we end up with 135.
Take the next digit (4) from the dividend and append it to 135, then repeat: 1354 / 249

On to step 6:
The number 249 fits into 1354 5 times, leaving a remainder of 109.
Write down 5 as next digit of the result. 
Result so far: 2055.0
Deduct 1245 from 1354 and we're left with 109.
Fetch the next digit (3) from the dividend, attach it to 109 and continue: 1093 / 249

On to step 7:
When dividing 1093 by 249, we get 4 with a remainder of 97.
Write down 4 as next digit of the result. 
Result so far: 20554.0
Subtracting 996 from 1093 leaves us with 97.
Include the next digit (1) from the dividend after 97, then repeat: 971 / 249

On to step 8:
249 goes into 971 3 times with a remainder of 224.
The number 3 becomes the next digit in our result. 
Result so far: 205543.0
Subtracting 747 from 971 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

On to step 9:
249 can be fit into 2240 8 times, resulting in a remainder of 248.
The number 8 becomes the next digit in our result. 
Result so far: 205543.8
Deduct 1992 from 2240 and we're left with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Moving on to step 10:
2480 divided by 249 is 9 with a remainder of 239.
The next digit of our result is 9. 
Result so far: 205543.89
If we subtract 2241 from 2480, we get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Let's proceed to step 11:
The number 249 fits into 2390 9 times, leaving a remainder of 149.
Put 9 as the next digit of the answer. 
Result so far: 205543.899
The remainder is 149 after subtracting 2241 from 2390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

The final result is 205543.899 with a remainder of 0.0149.