We divide 31209 by 16
We're looking to find how many times 16 goes into 31209.

Advancing to step 1:
The number 16 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 16

Going ahead to step 2:
16 goes into 31 1 times with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 16 away from 31, we end up with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 16

Advancing to step 3:
The number 16 fits into 152 9 times, leaving a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtracting 144 from 152 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 16

Step 4:
16 goes into 80 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 195.0
If we subtract 80 from 80, we get 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 16

Moving on to step 5:
16 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 1950.0
Deduct 0 from 9 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 6:
16 can be fit into 90 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 1950.5
If we take 80 away from 90, we end up 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.

Going ahead to step 7:
The number 16 fits into 100 6 times, leaving a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 1950.56
Subtract 96 from 100 to 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.

Moving on to step 8:
16 goes into 40 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 1950.562
If we subtract 32 from 40, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
The number 16 fits into 80 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1950.5625
Deduct 80 from 80 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.

On to step 10:
0 divided by 16 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1950.5625
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 11:
When dividing 0 by 16, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1950.5625
Deduct 0 from 0 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.

After the division, we end up with 1950.5625 and a remainder of 0.0.