Let's divide 40251455 by 109
We want to figure out the number of times 40251455 can be divided by 109.

Step 1:
If we divide 4 by 109, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 109

Advancing to step 2:
If we divide 40 by 109, we get 0 and a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Grab the next digit (2) from the dividend, add it to 40, then carry on: 402 / 109

On to step 3:
109 goes into 402 3 times with a remainder of 75.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 327 from 402 leaves us with 75.
Include the next digit (5) from the dividend after 75, then repeat: 755 / 109

Advancing to step 4:
If we divide 755 by 109, we get 6 and a remainder of 101.
The next digit of our result is 6. 
Result so far: 36.0
If we take 654 away from 755, we end up with 101.
Include the next digit (1) from the dividend after 101, then repeat: 1011 / 109

Advancing to step 5:
If we divide 1011 by 109, we get 9 and a remainder of 30.
Use 9 as the next digit of our solution. 
Result so far: 369.0
If we subtract 981 from 1011, we get 30.
Append the next digit (4) from the dividend to 30 and continue with: 304 / 109

Going ahead to step 6:
109 goes into 304 2 times with a remainder of 86.
Put 2 as the next digit of the answer. 
Result so far: 3692.0
The remainder is 86 after subtracting 218 from 304.
Fetch the next digit (5) from the dividend, attach it to 86 and continue: 865 / 109

On to step 7:
If we divide 865 by 109, we get 7 and a remainder of 102.
The next digit of our result is 7. 
Result so far: 36927.0
The remainder is 102 after subtracting 763 from 865.
Bring next digit (5) of the dividend behind the 102 and repeat the process: 1025 / 109

Moving on to step 8:
109 goes into 1025 9 times with a remainder of 44.
Use 9 as the next digit of our solution. 
Result so far: 369279.0
Subtract 981 from 1025 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
The number 109 fits into 440 4 times, leaving a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 369279.4
If we take 436 away from 440, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 10:
If we divide 40 by 109, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 369279.4
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 11:
400 divided by 109 is 3 with a remainder of 73.
Write down 3 as next digit of the result. 
Result so far: 369279.403
Subtract 327 from 400 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 12:
The number 109 fits into 730 6 times, leaving a remainder of 76.
Write down 6 as next digit of the result. 
Result so far: 369279.4036
If we take 654 away from 730, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 13:
760 divided by 109 is 6 with a remainder of 106.
Put 6 as the next digit of the answer. 
Result so far: 369279.40366
Deduct 654 from 760 and we're left with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

The final result is 369279.40366 with a remainder of 0.000106.