647211 divided by 87 
The aim is to understand the frequency of 87 in 647211.

On to step 1:
If we divide 6 by 87, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 87

On to step 2:
87 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Fetch the next digit (7) from the dividend, attach it to 64 and continue: 647 / 87

Advancing to step 3:
If we divide 647 by 87, we get 7 and a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 609 from 647, we get 38.
Include the next digit (2) from the dividend after 38, then repeat: 382 / 87

Let's proceed to step 4:
87 goes into 382 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 74.0
Subtract 348 from 382 to get 34.
Fetch the next digit (1) from the dividend, attach it to 34 and continue: 341 / 87

Step 5:
87 goes into 341 3 times with a remainder of 80.
Put 3 as the next digit of the answer. 
Result so far: 743.0
If we take 261 away from 341, we end up with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 87

Step 6:
801 divided by 87 is 9 with a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 7439.0
If we take 783 away from 801, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
The number 87 fits into 180 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 7439.2
If we take 174 away from 180, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 87, we get 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 7439.2
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
87 can be fit into 600 6 times, resulting in a remainder of 78.
Record the quotient 6 as the next digit in the result. 
Result so far: 7439.206
If we subtract 522 from 600, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 10:
The number 87 fits into 780 8 times, leaving a remainder of 84.
Write down 8 as next digit of the result. 
Result so far: 7439.2068
Subtract 696 from 780 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.

Advancing to step 11:
The number 87 fits into 840 9 times, leaving a remainder of 57.
Put 9 as the next digit of the answer. 
Result so far: 7439.20689
Subtracting 783 from 840 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 12:
570 divided by 87 is 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 7439.206896
The remainder is 48 after subtracting 522 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 13:
480 divided by 87 is 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 7439.2068965
The remainder is 45 after subtracting 435 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 14:
450 divided by 87 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 7439.20689655
Subtracting 435 from 450 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 7439.20689655, with a leftover of 1.5e-08.