613200 divided by 90 
The aim is to understand the frequency of 90 in 613200.

On to step 1:
90 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 90

Step 2:
61 divided by 90 is 0 with a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Fetch the next digit (3) from the dividend, attach it to 61 and continue: 613 / 90

Moving on to step 3:
613 divided by 90 is 6 with a remainder of 73.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 540 from 613, we get 73.
Grab the next digit (2) from the dividend, add it to 73, then carry on: 732 / 90

Moving on to step 4:
732 divided by 90 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 68.0
If we subtract 720 from 732, we get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 90

Advancing to step 5:
90 can be fit into 120 1 times, resulting in a remainder of 30.
The next digit of our result is 1. 
Result so far: 681.0
Deduct 90 from 120 and we're left with 30.
Append the next digit (0) from the dividend to 30 and continue with: 300 / 90

Moving on to step 6:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 6813.0
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 7:
300 divided by 90 is 3 with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 6813.3
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
300 divided by 90 is 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 6813.33
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 6813.33 with a balance of 0.03.