40125166 divided by 254 
We want to figure out the number of times 40125166 can be divided by 254.

Let's proceed to step 1:
When dividing 4 by 254, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 254

Let's proceed to step 2:
The number 254 fits into 40 0 times, leaving a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 254

Let's proceed to step 3:
254 goes into 401 1 times with a remainder of 147.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 254 from 401 leaves us with 147.
Include the next digit (2) from the dividend after 147, then repeat: 1472 / 254

Let's proceed to step 4:
254 goes into 1472 5 times with a remainder of 202.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtracting 1270 from 1472 leaves us with 202.
Take the next digit (5) from the dividend and append it to 202, then repeat: 2025 / 254

On to step 5:
If we divide 2025 by 254, we get 7 and a remainder of 247.
Write down 7 as next digit of the result. 
Result so far: 157.0
Deduct 1778 from 2025 and we're left with 247.
Take the next digit (1) from the dividend and append it to 247, then repeat: 2471 / 254

Going ahead to step 6:
If we divide 2471 by 254, we get 9 and a remainder of 185.
Put 9 as the next digit of the answer. 
Result so far: 1579.0
Subtracting 2286 from 2471 leaves us with 185.
Grab the next digit (6) from the dividend, add it to 185, then carry on: 1856 / 254

On to step 7:
254 goes into 1856 7 times with a remainder of 78.
The number 7 becomes the next digit in our result. 
Result so far: 15797.0
Deduct 1778 from 1856 and we're left with 78.
Append the next digit (6) from the dividend to 78 and continue with: 786 / 254

On to step 8:
254 can be fit into 786 3 times, resulting in a remainder of 24.
Put 3 as the next digit of the answer. 
Result so far: 157973.0
Subtracting 762 from 786 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 9:
254 goes into 240 0 times with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 157973.0
Subtracting 0 from 240 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 10:
If we divide 2400 by 254, we get 9 and a remainder of 114.
The next digit of our result is 9. 
Result so far: 157973.09
Subtracting 2286 from 2400 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Moving on to step 11:
254 can be fit into 1140 4 times, resulting in a remainder of 124.
The next digit of our result is 4. 
Result so far: 157973.094
If we take 1016 away from 1140, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 12:
254 can be fit into 1240 4 times, resulting in a remainder of 224.
Write down 4 as next digit of the result. 
Result so far: 157973.0944
Subtract 1016 from 1240 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

In conclusion, the division gives 157973.0944 with a balance of 0.00224.