849840 ÷ 12 
The aim is to understand the frequency of 12 in 849840.

Moving on to step 1:
If we divide 8 by 12, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 12

Moving on to step 2:
When dividing 84 by 12, we get 7 with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 84 from 84, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 12

Step 3:
If we divide 9 by 12, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 70.0
If we subtract 0 from 9, we get 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 12

Going ahead to step 4:
12 goes into 98 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 708.0
The remainder is 2 after subtracting 96 from 98.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 12

On to step 5:
When dividing 24 by 12, we get 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 7082.0
If we take 24 away from 24, we end up with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 12

Moving on to step 6:
If we divide 0 by 12, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 70820.0
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.

Step 7:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 70820.0
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.

On to step 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 70820.0
If we subtract 0 from 0, we 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 70820.0 and a remainder of 0.0.