We divide 603904 by 31
We're looking to find how many times 31 goes into 603904.

Step 1:
6 divided by 31 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 31

Step 2:
The number 31 fits into 60 1 times, leaving a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 31 away from 60, we end up with 29.
Grab the next digit (3) from the dividend, add it to 29, then carry on: 293 / 31

Step 3:
293 divided by 31 is 9 with a remainder of 14.
The next digit of our result is 9. 
Result so far: 19.0
If we take 279 away from 293, we end up with 14.
Grab the next digit (9) from the dividend, add it to 14, then carry on: 149 / 31

Let's proceed to step 4:
31 can be fit into 149 4 times, resulting in a remainder of 25.
The number 4 becomes the next digit in our result. 
Result so far: 194.0
The remainder is 25 after subtracting 124 from 149.
Bring next digit (0) of the dividend behind the 25 and repeat the process: 250 / 31

Let's proceed to step 5:
When dividing 250 by 31, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 1948.0
If we take 248 away from 250, we end up with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 31

Going ahead to step 6:
24 divided by 31 is 0 with a remainder of 24.
Record the quotient 0 as the next digit in the result. 
Result so far: 19480.0
Deduct 0 from 24 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
31 can be fit into 240 7 times, resulting in a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 19480.7
Subtract 217 from 240 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
31 can be fit into 230 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 19480.77
If we subtract 217 from 230, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 19480.77 with a remainder of 0.013.