212559 divided by 12 
Let's see how many times 12 fits into 212559.

On to step 1:
12 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 12

Step 2:
21 divided by 12 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 12 from 21 leaves us with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 12

Advancing to step 3:
92 divided by 12 is 7 with a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we subtract 84 from 92, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 12

Moving on to step 4:
85 divided by 12 is 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 177.0
The remainder is 1 after subtracting 84 from 85.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 12

Advancing to step 5:
12 goes into 15 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1771.0
The remainder is 3 after subtracting 12 from 15.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 12

Let's proceed to step 6:
39 divided by 12 is 3 with a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 17713.0
Subtracting 36 from 39 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
12 can be fit into 30 2 times, resulting in a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 17713.2
Deduct 24 from 30 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 12, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 17713.25
Subtract 60 from 60 to 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.

Advancing to step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17713.25
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.

Step 10:
0 divided by 12 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17713.25
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.

Our division results in 17713.25 with a remaining 0.0.