31904 ÷ 20 
We want to divide 31904 by 20.

Going ahead to step 1:
The number 20 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 20

Advancing to step 2:
The number 20 fits into 31 1 times, leaving a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 11 after subtracting 20 from 31.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 20

Going ahead to step 3:
The number 20 fits into 119 5 times, leaving a remainder of 19.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 19 after subtracting 100 from 119.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 20

Step 4:
20 goes into 190 9 times with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
If we subtract 180 from 190, we get 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 20

Going ahead to step 5:
20 goes into 104 5 times with a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 1595.0
If we subtract 100 from 104, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 6:
20 can be fit into 40 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 1595.2
If we subtract 40 from 40, 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.

Moving on to step 7:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1595.2
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.

Moving on to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1595.2
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.

After the division, we end up with 1595.2 and a remainder of 0.0.