We're dividing 90270390 by 299 
The aim is to understand the frequency of 299 in 90270390.

Moving on to step 1:
299 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 299

Let's proceed to step 2:
The number 299 fits into 90 0 times, leaving a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Fetch the next digit (2) from the dividend, attach it to 90 and continue: 902 / 299

Moving on to step 3:
299 can be fit into 902 3 times, resulting in a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 897 from 902, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 299

Step 4:
299 can be fit into 57 0 times, resulting in a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Subtracting 0 from 57 leaves us with 57.
Take the next digit (0) from the dividend and append it to 57, then repeat: 570 / 299

On to step 5:
299 goes into 570 1 times with a remainder of 271.
Write down 1 as next digit of the result. 
Result so far: 301.0
The remainder is 271 after subtracting 299 from 570.
Take the next digit (3) from the dividend and append it to 271, then repeat: 2713 / 299

Step 6:
If we divide 2713 by 299, we get 9 and a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 3019.0
The remainder is 22 after subtracting 2691 from 2713.
Grab the next digit (9) from the dividend, add it to 22, then carry on: 229 / 299

Moving on to step 7:
299 goes into 229 0 times with a remainder of 229.
Write down 0 as next digit of the result. 
Result so far: 30190.0
Subtracting 0 from 229 leaves us with 229.
Grab the next digit (0) from the dividend, add it to 229, then carry on: 2290 / 299

Moving on to step 8:
299 can be fit into 2290 7 times, resulting in a remainder of 197.
Write down 7 as next digit of the result. 
Result so far: 301907.0
The remainder is 197 after subtracting 2093 from 2290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 9:
If we divide 1970 by 299, we get 6 and a remainder of 176.
Record the quotient 6 as the next digit in the result. 
Result so far: 301907.6
Subtracting 1794 from 1970 leaves us with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 10:
299 can be fit into 1760 5 times, resulting in a remainder of 265.
The next digit of our result is 5. 
Result so far: 301907.65
If we take 1495 away from 1760, we end up with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Advancing to step 11:
When dividing 2650 by 299, we get 8 with a remainder of 258.
Record the quotient 8 as the next digit in the result. 
Result so far: 301907.658
The remainder is 258 after subtracting 2392 from 2650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Let's proceed to step 12:
299 goes into 2580 8 times with a remainder of 188.
The number 8 becomes the next digit in our result. 
Result so far: 301907.6588
Deduct 2392 from 2580 and we're left with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final outcome is 301907.6588, with a leftover of 0.00188.