40428168 ÷ 631 
We want to divide 40428168 by 631.

On to step 1:
631 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 631

Step 2:
When dividing 40 by 631, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Fetch the next digit (4) from the dividend, attach it to 40 and continue: 404 / 631

On to step 3:
The number 631 fits into 404 0 times, leaving a remainder of 404.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 404, we end up with 404.
Bring next digit (2) of the dividend behind the 404 and repeat the process: 4042 / 631

Going ahead to step 4:
631 goes into 4042 6 times with a remainder of 256.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 3786 from 4042 to get 256.
Include the next digit (8) from the dividend after 256, then repeat: 2568 / 631

Let's proceed to step 5:
631 can be fit into 2568 4 times, resulting in a remainder of 44.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
Subtracting 2524 from 2568 leaves us with 44.
Bring next digit (1) of the dividend behind the 44 and repeat the process: 441 / 631

Step 6:
441 divided by 631 is 0 with a remainder of 441.
Put 0 as the next digit of the answer. 
Result so far: 640.0
Subtracting 0 from 441 leaves us with 441.
Fetch the next digit (6) from the dividend, attach it to 441 and continue: 4416 / 631

Step 7:
631 goes into 4416 6 times with a remainder of 630.
Record the quotient 6 as the next digit in the result. 
Result so far: 6406.0
If we subtract 3786 from 4416, we get 630.
Append the next digit (8) from the dividend to 630 and continue with: 6308 / 631

Step 8:
631 goes into 6308 9 times with a remainder of 629.
Put 9 as the next digit of the answer. 
Result so far: 64069.0
If we subtract 5679 from 6308, we get 629.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6290, and continue the process.

Step 9:
The number 631 fits into 6290 9 times, leaving a remainder of 611.
Put 9 as the next digit of the answer. 
Result so far: 64069.9
If we take 5679 away from 6290, we end up with 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Moving on to step 10:
6110 divided by 631 is 9 with a remainder of 431.
The next digit of our result is 9. 
Result so far: 64069.99
If we take 5679 away from 6110, we end up with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Our division results in 64069.99 with a remaining 0.431.