391331 divided by 20 
We want to figure out the number of times 391331 can be divided by 20.

Let's proceed to step 1:
The number 20 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 20

Going ahead to step 2:
20 can be fit into 39 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 20 from 39 to get 19.
Append the next digit (1) from the dividend to 19 and continue with: 191 / 20

Step 3:
20 can be fit into 191 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we take 180 away from 191, we end up with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 20

Advancing to step 4:
20 goes into 113 5 times with a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 195.0
Subtracting 100 from 113 leaves us with 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 20

On to step 5:
The number 20 fits into 133 6 times, leaving a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 1956.0
Deduct 120 from 133 and we're left with 13.
Take the next digit (1) from the dividend and append it to 13, then repeat: 131 / 20

Moving on to step 6:
20 goes into 131 6 times with a remainder of 11.
The next digit of our result is 6. 
Result so far: 19566.0
If we subtract 120 from 131, we get 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:
20 can be fit into 110 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 19566.5
Subtracting 100 from 110 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 19566.55
Subtracting 100 from 100 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.

After the division, we end up with 19566.55 and a remainder of 0.0.