39878800 divided by 300 
The aim is to understand the frequency of 300 in 39878800.

Advancing to step 1:
When dividing 3 by 300, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 300

Advancing to step 2:
39 divided by 300 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (8) from the dividend, add it to 39, then carry on: 398 / 300

Going ahead to step 3:
398 divided by 300 is 1 with a remainder of 98.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 300 from 398, we get 98.
Grab the next digit (7) from the dividend, add it to 98, then carry on: 987 / 300

On to step 4:
300 can be fit into 987 3 times, resulting in a remainder of 87.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 900 from 987 and we're left with 87.
Bring next digit (8) of the dividend behind the 87 and repeat the process: 878 / 300

Going ahead to step 5:
300 can be fit into 878 2 times, resulting in a remainder of 278.
The number 2 becomes the next digit in our result. 
Result so far: 132.0
If we take 600 away from 878, we end up with 278.
Append the next digit (8) from the dividend to 278 and continue with: 2788 / 300

Going ahead to step 6:
The number 300 fits into 2788 9 times, leaving a remainder of 88.
Put 9 as the next digit of the answer. 
Result so far: 1329.0
Subtracting 2700 from 2788 leaves us with 88.
Take the next digit (0) from the dividend and append it to 88, then repeat: 880 / 300

Step 7:
300 goes into 880 2 times with a remainder of 280.
The number 2 becomes the next digit in our result. 
Result so far: 13292.0
Subtract 600 from 880 to get 280.
Take the next digit (0) from the dividend and append it to 280, then repeat: 2800 / 300

Let's proceed to step 8:
300 goes into 2800 9 times with a remainder of 100.
The number 9 becomes the next digit in our result. 
Result so far: 132929.0
The remainder is 100 after subtracting 2700 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 9:
If we divide 1000 by 300, we get 3 and a remainder of 100.
Use 3 as the next digit of our solution. 
Result so far: 132929.3
If we subtract 900 from 1000, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 10:
The number 300 fits into 1000 3 times, leaving a remainder of 100.
Use 3 as the next digit of our solution. 
Result so far: 132929.33
Subtract 900 from 1000 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final result is 132929.33 with a remainder of 0.1.