We look at the division of 770608 by 87 
The aim is to understand the frequency of 87 in 770608.

On to step 1:
The number 87 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 87

Going ahead to step 2:
The number 87 fits into 77 0 times, leaving a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 77 and we're left with 77.
Grab the next digit (0) from the dividend, add it to 77, then carry on: 770 / 87

Moving on to step 3:
When dividing 770 by 87, we get 8 with a remainder of 74.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 696 from 770, we get 74.
Append the next digit (6) from the dividend to 74 and continue with: 746 / 87

Step 4:
87 goes into 746 8 times with a remainder of 50.
The next digit of our result is 8. 
Result so far: 88.0
If we take 696 away from 746, we end up with 50.
Bring next digit (0) of the dividend behind the 50 and repeat the process: 500 / 87

Advancing to step 5:
87 can be fit into 500 5 times, resulting in a remainder of 65.
The next digit of our result is 5. 
Result so far: 885.0
Subtract 435 from 500 to get 65.
Include the next digit (8) from the dividend after 65, then repeat: 658 / 87

Going ahead to step 6:
The number 87 fits into 658 7 times, leaving a remainder of 49.
Record the quotient 7 as the next digit in the result. 
Result so far: 8857.0
If we subtract 609 from 658, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 7:
The number 87 fits into 490 5 times, leaving a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 8857.5
Subtract 435 from 490 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 8:
87 goes into 550 6 times with a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 8857.56
If we take 522 away from 550, 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.

Advancing to step 9:
When dividing 280 by 87, we get 3 with a remainder of 19.
Write down 3 as next digit of the result. 
Result so far: 8857.563
The remainder is 19 after subtracting 261 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
87 can be fit into 190 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 8857.5632
Subtracting 174 from 190 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
87 can be fit into 160 1 times, resulting in a remainder of 73.
The next digit of our result is 1. 
Result so far: 8857.56321
If we subtract 87 from 160, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 12:
The number 87 fits into 730 8 times, leaving a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 8857.563218
If we subtract 696 from 730, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 13:
The number 87 fits into 340 3 times, leaving a remainder of 79.
Record the quotient 3 as the next digit in the result. 
Result so far: 8857.5632183
If we take 261 away from 340, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 14:
87 goes into 790 9 times with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 8857.56321839
The remainder is 7 after subtracting 783 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final result is 8857.56321839 with a remainder of 7e-09.