209866 ÷ 16 
We want to divide 209866 by 16.

Moving on to step 1:
The number 16 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 16

Step 2:
16 can be fit into 20 1 times, resulting in a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 16 from 20 leaves us with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 16

Going ahead to step 3:
The number 16 fits into 49 3 times, leaving a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 48 from 49 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 16

Step 4:
16 can be fit into 18 1 times, resulting in a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 131.0
If we subtract 16 from 18, we get 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 16

Let's proceed to step 5:
16 can be fit into 26 1 times, resulting in a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1311.0
The remainder is 10 after subtracting 16 from 26.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 16

Advancing to step 6:
The number 16 fits into 106 6 times, leaving a remainder of 10.
The next digit of our result is 6. 
Result so far: 13116.0
If we subtract 96 from 106, we get 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 7:
If we divide 100 by 16, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 13116.6
Subtracting 96 from 100 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
16 goes into 40 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 13116.62
The remainder is 8 after subtracting 32 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
80 divided by 16 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 13116.625
The remainder is 0 after subtracting 80 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
16 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 13116.625
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.

On to step 11:
When dividing 0 by 16, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 13116.625
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.

The final outcome is 13116.625, with a leftover of 0.0.