403091 divided by 40 
Our goal is to divide 403091 by 40.

Going ahead to step 1:
The number 40 fits into 4 0 times, leaving 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.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 40

Moving on to step 2:
The number 40 fits into 40 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 40 from 40 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 40

Step 3:
If we divide 3 by 40, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 3 to get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 40

Moving on to step 4:
40 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
Subtracting 0 from 30 leaves us with 30.
Include the next digit (9) from the dividend after 30, then repeat: 309 / 40

Let's proceed to step 5:
When dividing 309 by 40, we get 7 with a remainder of 29.
Record the quotient 7 as the next digit in the result. 
Result so far: 1007.0
Deduct 280 from 309 and we're left with 29.
Fetch the next digit (1) from the dividend, attach it to 29 and continue: 291 / 40

Advancing to step 6:
The number 40 fits into 291 7 times, leaving a remainder of 11.
The next digit of our result is 7. 
Result so far: 10077.0
If we take 280 away from 291, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
When dividing 110 by 40, we get 2 with a remainder of 30.
Use 2 as the next digit of our solution. 
Result so far: 10077.2
If we subtract 80 from 110, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
40 can be fit into 300 7 times, resulting in a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 10077.27
If we take 280 away from 300, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
40 goes into 200 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10077.275
Deduct 200 from 200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
When dividing 0 by 40, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10077.275
Subtracting 0 from 0 leaves us with 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 11:
40 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10077.275
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 10077.275, and the remainder is 0.0.