40749807 ÷ 129 
We want to figure out the number of times 40749807 can be divided by 129.

On to step 1:
4 divided by 129 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
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 / 129

Let's proceed to step 2:
When dividing 40 by 129, we get 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (7) from the dividend and append it to 40, then repeat: 407 / 129

Moving on to step 3:
407 divided by 129 is 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 20 after subtracting 387 from 407.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 129

Going ahead to step 4:
204 divided by 129 is 1 with a remainder of 75.
The next digit of our result is 1. 
Result so far: 31.0
If we subtract 129 from 204, we get 75.
Take the next digit (9) from the dividend and append it to 75, then repeat: 759 / 129

Let's proceed to step 5:
129 can be fit into 759 5 times, resulting in a remainder of 114.
The next digit of our result is 5. 
Result so far: 315.0
Deduct 645 from 759 and we're left with 114.
Append the next digit (8) from the dividend to 114 and continue with: 1148 / 129

On to step 6:
129 goes into 1148 8 times with a remainder of 116.
The number 8 becomes the next digit in our result. 
Result so far: 3158.0
If we subtract 1032 from 1148, we get 116.
Fetch the next digit (0) from the dividend, attach it to 116 and continue: 1160 / 129

Advancing to step 7:
If we divide 1160 by 129, we get 8 and a remainder of 128.
The next digit of our result is 8. 
Result so far: 31588.0
If we take 1032 away from 1160, we end up with 128.
Append the next digit (7) from the dividend to 128 and continue with: 1287 / 129

Going ahead to step 8:
1287 divided by 129 is 9 with a remainder of 126.
The next digit of our result is 9. 
Result so far: 315889.0
Deduct 1161 from 1287 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 9:
129 goes into 1260 9 times with a remainder of 99.
Put 9 as the next digit of the answer. 
Result so far: 315889.9
Subtracting 1161 from 1260 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 10:
If we divide 990 by 129, we get 7 and a remainder of 87.
The number 7 becomes the next digit in our result. 
Result so far: 315889.97
The remainder is 87 after subtracting 903 from 990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 11:
When dividing 870 by 129, we get 6 with a remainder of 96.
Use 6 as the next digit of our solution. 
Result so far: 315889.976
Deduct 774 from 870 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Going ahead to step 12:
When dividing 960 by 129, we get 7 with a remainder of 57.
The next digit of our result is 7. 
Result so far: 315889.9767
Subtract 903 from 960 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 13:
When dividing 570 by 129, we get 4 with a remainder of 54.
Use 4 as the next digit of our solution. 
Result so far: 315889.97674
If we take 516 away from 570, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 14:
129 can be fit into 540 4 times, resulting in a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 315889.976744
Subtracting 516 from 540 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.

The final outcome is 315889.976744, with a leftover of 2.4e-06.