212133 ÷ 18 
We want to figure out the number of times 212133 can be divided by 18.

Advancing to step 1:
If we divide 2 by 18, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 18

On to step 2:
The number 18 fits into 21 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
If we take 18 away from 21, we end up with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 18

Step 3:
18 goes into 32 1 times with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 18 away from 32, we end up with 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 18

Step 4:
18 can be fit into 141 7 times, resulting in a remainder of 15.
The next digit of our result is 7. 
Result so far: 117.0
The remainder is 15 after subtracting 126 from 141.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 18

Going ahead to step 5:
If we divide 153 by 18, we get 8 and a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 1178.0
If we subtract 144 from 153, we get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 18

Step 6:
18 goes into 93 5 times with a remainder of 3.
The next digit of our result is 5. 
Result so far: 11785.0
If we subtract 90 from 93, we get 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:
30 divided by 18 is 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 11785.1
Subtract 18 from 30 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
The number 18 fits into 120 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 11785.16
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
When dividing 120 by 18, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 11785.166
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 11785.166 with a remainder of 0.0012.