We're dividing 213245 by 12 
The aim is to understand the frequency of 12 in 213245.

On to step 1:
If we divide 2 by 12, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 12

Let's proceed to step 2:
12 can be fit into 21 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 12 from 21 leaves us with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 12

Let's proceed to step 3:
The number 12 fits into 93 7 times, leaving a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we take 84 away from 93, we end up with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 12

On to step 4:
92 divided by 12 is 7 with a remainder of 8.
Record the quotient 7 as the next digit in the result. 
Result so far: 177.0
If we subtract 84 from 92, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 12

On to step 5:
When dividing 84 by 12, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 1777.0
If we subtract 84 from 84, we get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 12

Moving on to step 6:
12 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 17770.0
The remainder is 5 after subtracting 0 from 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
The number 12 fits into 50 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 17770.4
Subtracting 48 from 50 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
If we divide 20 by 12, we get 1 and a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 17770.41
Subtracting 12 from 20 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
12 goes into 80 6 times with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 17770.416
If we subtract 72 from 80, 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 10:
If we divide 80 by 12, we get 6 and a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 17770.4166
Subtract 72 from 80 to 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.

The quotient of the division is 17770.4166, and the remainder is 8e-05.