87212475 divided by 217 
The aim is to understand the frequency of 217 in 87212475.

Advancing to step 1:
If we divide 8 by 217, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 217

Step 2:
When dividing 87 by 217, we get 0 with a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Fetch the next digit (2) from the dividend, attach it to 87 and continue: 872 / 217

On to step 3:
217 can be fit into 872 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 868 from 872 leaves us with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 217

Going ahead to step 4:
41 divided by 217 is 0 with a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
If we subtract 0 from 41, we get 41.
Grab the next digit (2) from the dividend, add it to 41, then carry on: 412 / 217

Advancing to step 5:
217 can be fit into 412 1 times, resulting in a remainder of 195.
Record the quotient 1 as the next digit in the result. 
Result so far: 401.0
If we take 217 away from 412, we end up with 195.
Fetch the next digit (4) from the dividend, attach it to 195 and continue: 1954 / 217

Step 6:
217 goes into 1954 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 4019.0
The remainder is 1 after subtracting 1953 from 1954.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 217

Advancing to step 7:
The number 217 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 40190.0
Subtract 0 from 17 to get 17.
Grab the next digit (5) from the dividend, add it to 17, then carry on: 175 / 217

Step 8:
217 can be fit into 175 0 times, resulting in a remainder of 175.
Write down 0 as next digit of the result. 
Result so far: 401900.0
If we take 0 away from 175, we end up with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Going ahead to step 9:
The number 217 fits into 1750 8 times, leaving a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 401900.8
Deduct 1736 from 1750 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
217 goes into 140 0 times with a remainder of 140.
The next digit of our result is 0. 
Result so far: 401900.8
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 11:
217 can be fit into 1400 6 times, resulting in a remainder of 98.
The number 6 becomes the next digit in our result. 
Result so far: 401900.806
The remainder is 98 after subtracting 1302 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 12:
217 can be fit into 980 4 times, resulting in a remainder of 112.
The next digit of our result is 4. 
Result so far: 401900.8064
Deduct 868 from 980 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 13:
The number 217 fits into 1120 5 times, leaving a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 401900.80645
Subtract 1085 from 1120 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 14:
The number 217 fits into 350 1 times, leaving a remainder of 133.
The number 1 becomes the next digit in our result. 
Result so far: 401900.806451
Subtract 217 from 350 to get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Step 15:
1330 divided by 217 is 6 with a remainder of 28.
The next digit of our result is 6. 
Result so far: 401900.8064516
If we take 1302 away from 1330, we end up with 28.
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 16:
If we divide 280 by 217, we get 1 and a remainder of 63.
Use 1 as the next digit of our solution. 
Result so far: 401900.80645161
If we subtract 217 from 280, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

After the division, we end up with 401900.80645161 and a remainder of 6.3e-08.