We look at the division of 21158184 by 300 
The aim is to understand the frequency of 300 in 21158184.

Step 1:
The number 300 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 300

Let's proceed to step 2:
300 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 300

Let's proceed to step 3:
300 goes into 211 0 times with a remainder of 211.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Fetch the next digit (5) from the dividend, attach it to 211 and continue: 2115 / 300

Going ahead to step 4:
2115 divided by 300 is 7 with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 2100 from 2115, we get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 300

Moving on to step 5:
158 divided by 300 is 0 with a remainder of 158.
Put 0 as the next digit of the answer. 
Result so far: 70.0
Subtract 0 from 158 to get 158.
Append the next digit (1) from the dividend to 158 and continue with: 1581 / 300

Going ahead to step 6:
If we divide 1581 by 300, we get 5 and a remainder of 81.
Write down 5 as next digit of the result. 
Result so far: 705.0
The remainder is 81 after subtracting 1500 from 1581.
Append the next digit (8) from the dividend to 81 and continue with: 818 / 300

Let's proceed to step 7:
300 can be fit into 818 2 times, resulting in a remainder of 218.
Write down 2 as next digit of the result. 
Result so far: 7052.0
Deduct 600 from 818 and we're left with 218.
Fetch the next digit (4) from the dividend, attach it to 218 and continue: 2184 / 300

Step 8:
2184 divided by 300 is 7 with a remainder of 84.
Put 7 as the next digit of the answer. 
Result so far: 70527.0
Subtract 2100 from 2184 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
300 goes into 840 2 times with a remainder of 240.
Put 2 as the next digit of the answer. 
Result so far: 70527.2
If we subtract 600 from 840, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 10:
2400 divided by 300 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 70527.28
If we subtract 2400 from 2400, 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.

Advancing to step 11:
When dividing 0 by 300, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 70527.28
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
300 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 70527.28
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.

Our division results in 70527.28 with a remaining 0.0.