40290868 divided by 256 
We want to figure out the number of times 40290868 can be divided by 256.

On to step 1:
When dividing 4 by 256, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 256

Advancing to step 2:
If we divide 40 by 256, we get 0 and a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (2) from the dividend and append it to 40, then repeat: 402 / 256

Moving on to step 3:
402 divided by 256 is 1 with a remainder of 146.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 256 from 402, we get 146.
Fetch the next digit (9) from the dividend, attach it to 146 and continue: 1469 / 256

Advancing to step 4:
256 goes into 1469 5 times with a remainder of 189.
Use 5 as the next digit of our solution. 
Result so far: 15.0
If we subtract 1280 from 1469, we get 189.
Grab the next digit (0) from the dividend, add it to 189, then carry on: 1890 / 256

Step 5:
The number 256 fits into 1890 7 times, leaving a remainder of 98.
Write down 7 as next digit of the result. 
Result so far: 157.0
Deduct 1792 from 1890 and we're left with 98.
Include the next digit (8) from the dividend after 98, then repeat: 988 / 256

Advancing to step 6:
988 divided by 256 is 3 with a remainder of 220.
Write down 3 as next digit of the result. 
Result so far: 1573.0
Subtracting 768 from 988 leaves us with 220.
Fetch the next digit (6) from the dividend, attach it to 220 and continue: 2206 / 256

Step 7:
If we divide 2206 by 256, we get 8 and a remainder of 158.
The number 8 becomes the next digit in our result. 
Result so far: 15738.0
Subtract 2048 from 2206 to get 158.
Append the next digit (8) from the dividend to 158 and continue with: 1588 / 256

Let's proceed to step 8:
256 can be fit into 1588 6 times, resulting in a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 157386.0
Subtract 1536 from 1588 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 9:
If we divide 520 by 256, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 157386.2
Subtract 512 from 520 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
The number 256 fits into 80 0 times, leaving a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 157386.2
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
256 can be fit into 800 3 times, resulting in a remainder of 32.
Put 3 as the next digit of the answer. 
Result so far: 157386.203
Deduct 768 from 800 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 12:
When dividing 320 by 256, we get 1 with a remainder of 64.
Put 1 as the next digit of the answer. 
Result so far: 157386.2031
Subtract 256 from 320 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
640 divided by 256 is 2 with a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 157386.20312
If we subtract 512 from 640, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 14:
1280 divided by 256 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 157386.203125
Subtract 1280 from 1280 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 15:
If we divide 0 by 256, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 157386.203125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 16:
0 divided by 256 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 157386.203125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 157386.203125 with a remaining 0.0.