We divide 12215971 by 216
The aim is to understand the frequency of 216 in 12215971.

Step 1:
If we divide 1 by 216, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 216

Advancing to step 2:
When dividing 12 by 216, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 216

Moving on to step 3:
216 goes into 122 0 times with a remainder of 122.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 122 after subtracting 0 from 122.
Append the next digit (1) from the dividend to 122 and continue with: 1221 / 216

On to step 4:
When dividing 1221 by 216, we get 5 with a remainder of 141.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 1080 from 1221 leaves us with 141.
Include the next digit (5) from the dividend after 141, then repeat: 1415 / 216

Step 5:
If we divide 1415 by 216, we get 6 and a remainder of 119.
The number 6 becomes the next digit in our result. 
Result so far: 56.0
If we take 1296 away from 1415, we end up with 119.
Include the next digit (9) from the dividend after 119, then repeat: 1199 / 216

Let's proceed to step 6:
1199 divided by 216 is 5 with a remainder of 119.
Write down 5 as next digit of the result. 
Result so far: 565.0
Subtract 1080 from 1199 to get 119.
Grab the next digit (7) from the dividend, add it to 119, then carry on: 1197 / 216

Step 7:
If we divide 1197 by 216, we get 5 and a remainder of 117.
Write down 5 as next digit of the result. 
Result so far: 5655.0
If we subtract 1080 from 1197, we get 117.
Grab the next digit (1) from the dividend, add it to 117, then carry on: 1171 / 216

Moving on to step 8:
The number 216 fits into 1171 5 times, leaving a remainder of 91.
Record the quotient 5 as the next digit in the result. 
Result so far: 56555.0
If we take 1080 away from 1171, we end up with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Moving on to step 9:
The number 216 fits into 910 4 times, leaving a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 56555.4
Subtracting 864 from 910 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 10:
460 divided by 216 is 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 56555.42
The remainder is 28 after subtracting 432 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 11:
216 can be fit into 280 1 times, resulting in a remainder of 64.
Write down 1 as next digit of the result. 
Result so far: 56555.421
Deduct 216 from 280 and we're left 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 12:
If we divide 640 by 216, we get 2 and a remainder of 208.
Write down 2 as next digit of the result. 
Result so far: 56555.4212
Deduct 432 from 640 and we're left with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 13:
216 can be fit into 2080 9 times, resulting in a remainder of 136.
Put 9 as the next digit of the answer. 
Result so far: 56555.42129
If we take 1944 away from 2080, we end up 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.

On to step 14:
216 goes into 1360 6 times with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 56555.421296
Subtracting 1296 from 1360 leaves us 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.

Moving on to step 15:
216 can be fit into 640 2 times, resulting in a remainder of 208.
Record the quotient 2 as the next digit in the result. 
Result so far: 56555.4212962
Subtracting 432 from 640 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Going ahead to step 16:
When dividing 2080 by 216, we get 9 with a remainder of 136.
Write down 9 as next digit of the result. 
Result so far: 56555.42129629
If we take 1944 away from 2080, we end up 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.

After the division, we end up with 56555.42129629 and a remainder of 1.36e-07.