We divide 71229984 by 87
The aim is to understand the frequency of 87 in 71229984.

Going ahead to step 1:
87 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 87

Let's proceed to step 2:
The number 87 fits into 71 0 times, leaving a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 71, we end up with 71.
Append the next digit (2) from the dividend to 71 and continue with: 712 / 87

Advancing to step 3:
712 divided by 87 is 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 696 from 712 to get 16.
Grab the next digit (2) from the dividend, add it to 16, then carry on: 162 / 87

Moving on to step 4:
162 divided by 87 is 1 with a remainder of 75.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
Deduct 87 from 162 and we're left with 75.
Take the next digit (9) from the dividend and append it to 75, then repeat: 759 / 87

Let's proceed to step 5:
87 goes into 759 8 times with a remainder of 63.
Put 8 as the next digit of the answer. 
Result so far: 818.0
Subtract 696 from 759 to get 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 87

Step 6:
87 goes into 639 7 times with a remainder of 30.
The next digit of our result is 7. 
Result so far: 8187.0
Subtract 609 from 639 to get 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 87

Advancing to step 7:
87 goes into 308 3 times with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 81873.0
If we take 261 away from 308, we end up with 47.
Grab the next digit (4) from the dividend, add it to 47, then carry on: 474 / 87

On to step 8:
When dividing 474 by 87, we get 5 with a remainder of 39.
Use 5 as the next digit of our solution. 
Result so far: 818735.0
If we subtract 435 from 474, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 9:
The number 87 fits into 390 4 times, leaving a remainder of 42.
Write down 4 as next digit of the result. 
Result so far: 818735.4
Deduct 348 from 390 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
87 can be fit into 420 4 times, resulting in a remainder of 72.
Use 4 as the next digit of our solution. 
Result so far: 818735.44
Subtracting 348 from 420 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final result is 818735.44 with a remainder of 0.072.