We're dividing 66816289 by 216 
The aim is to understand the frequency of 216 in 66816289.

Moving on to step 1:
6 divided by 216 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 216

Let's proceed to step 2:
When dividing 66 by 216, we get 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Include the next digit (8) from the dividend after 66, then repeat: 668 / 216

Going ahead to step 3:
216 goes into 668 3 times with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 648 from 668 to get 20.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 216

Going ahead to step 4:
201 divided by 216 is 0 with a remainder of 201.
The next digit of our result is 0. 
Result so far: 30.0
If we subtract 0 from 201, we get 201.
Take the next digit (6) from the dividend and append it to 201, then repeat: 2016 / 216

Moving on to step 5:
2016 divided by 216 is 9 with a remainder of 72.
Use 9 as the next digit of our solution. 
Result so far: 309.0
Deduct 1944 from 2016 and we're left with 72.
Grab the next digit (2) from the dividend, add it to 72, then carry on: 722 / 216

Going ahead to step 6:
722 divided by 216 is 3 with a remainder of 74.
The number 3 becomes the next digit in our result. 
Result so far: 3093.0
If we subtract 648 from 722, we get 74.
Take the next digit (8) from the dividend and append it to 74, then repeat: 748 / 216

Advancing to step 7:
748 divided by 216 is 3 with a remainder of 100.
The number 3 becomes the next digit in our result. 
Result so far: 30933.0
Deduct 648 from 748 and we're left with 100.
Grab the next digit (9) from the dividend, add it to 100, then carry on: 1009 / 216

Advancing to step 8:
216 can be fit into 1009 4 times, resulting in a remainder of 145.
Write down 4 as next digit of the result. 
Result so far: 309334.0
If we subtract 864 from 1009, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 9:
The number 216 fits into 1450 6 times, leaving a remainder of 154.
Use 6 as the next digit of our solution. 
Result so far: 309334.6
The remainder is 154 after subtracting 1296 from 1450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Step 10:
216 goes into 1540 7 times with a remainder of 28.
The number 7 becomes the next digit in our result. 
Result so far: 309334.67
If we subtract 1512 from 1540, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
The number 216 fits into 280 1 times, leaving a remainder of 64.
Record the quotient 1 as the next digit in the result. 
Result so far: 309334.671
If we subtract 216 from 280, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 12:
640 divided by 216 is 2 with a remainder of 208.
The next digit of our result is 2. 
Result so far: 309334.6712
Subtract 432 from 640 to get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 13:
216 goes into 2080 9 times with a remainder of 136.
Write down 9 as next digit of the result. 
Result so far: 309334.67129
Subtracting 1944 from 2080 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 14:
If we divide 1360 by 216, we get 6 and a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 309334.671296
If we take 1296 away from 1360, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 15:
216 can be fit into 640 2 times, resulting in a remainder of 208.
Write down 2 as next digit of the result. 
Result so far: 309334.6712962
Subtract 432 from 640 to get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 16:
If we divide 2080 by 216, we get 9 and a remainder of 136.
Put 9 as the next digit of the answer. 
Result so far: 309334.67129629
The remainder is 136 after subtracting 1944 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Our division results in 309334.67129629 with a remaining 1.36e-07.