391520 divided by 40 
We want to figure out the number of times 391520 can be divided by 40.

Moving on to step 1:
If we divide 3 by 40, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 40

Going ahead to step 2:
When dividing 39 by 40, we get 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 40

Let's proceed to step 3:
The number 40 fits into 391 9 times, leaving a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 360 from 391 to get 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 40

Advancing to step 4:
When dividing 315 by 40, we get 7 with a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Subtracting 280 from 315 leaves us with 35.
Include the next digit (2) from the dividend after 35, then repeat: 352 / 40

Step 5:
The number 40 fits into 352 8 times, leaving a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 978.0
Subtract 320 from 352 to get 32.
Bring next digit (0) of the dividend behind the 32 and repeat the process: 320 / 40

Advancing to step 6:
If we divide 320 by 40, we get 8 and a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 9788.0
Deduct 320 from 320 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.

Let's proceed to step 7:
If we divide 0 by 40, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 9788.0
If we subtract 0 from 0, we 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 8:
40 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 9788.0
Subtract 0 from 0 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.

The quotient of the division is 9788.0, and the remainder is 0.0.