We're dividing 221205 by 12 
We want to figure out the number of times 221205 can be divided by 12.

Step 1:
If we divide 2 by 12, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 12

On to step 2:
When dividing 22 by 12, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 12 from 22, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 12

Let's proceed to step 3:
12 can be fit into 101 8 times, resulting in a remainder of 5.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 96 from 101 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 12

Step 4:
12 goes into 52 4 times with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 184.0
Deduct 48 from 52 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 12

On to step 5:
When dividing 40 by 12, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 1843.0
Deduct 36 from 40 and we're left with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 12

Moving on to step 6:
12 can be fit into 45 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 18433.0
Subtract 36 from 45 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
If we divide 90 by 12, we get 7 and a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 18433.7
The remainder is 6 after subtracting 84 from 90.
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:
12 goes into 60 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 18433.75
Deduct 60 from 60 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.

Advancing to step 9:
When dividing 0 by 12, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 18433.75
Subtract 0 from 0 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.

Let's proceed to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 18433.75
Subtract 0 from 0 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.

After the division, we end up with 18433.75 and a remainder of 0.0.