We look at the division of 880405 by 87 
The aim is to understand the frequency of 87 in 880405.

Going ahead to step 1:
8 divided by 87 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 87

Let's proceed to step 2:
88 divided by 87 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 87 from 88 and we're left with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 87

Going ahead to step 3:
87 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 10 leaves us with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 87

Advancing to step 4:
104 divided by 87 is 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 101.0
Deduct 87 from 104 and we're left with 17.
Include the next digit (0) from the dividend after 17, then repeat: 170 / 87

Let's proceed to step 5:
170 divided by 87 is 1 with a remainder of 83.
Record the quotient 1 as the next digit in the result. 
Result so far: 1011.0
Deduct 87 from 170 and we're left with 83.
Grab the next digit (5) from the dividend, add it to 83, then carry on: 835 / 87

Let's proceed to step 6:
87 can be fit into 835 9 times, resulting in a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 10119.0
If we take 783 away from 835, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 7:
If we divide 520 by 87, we get 5 and a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 10119.5
The remainder is 85 after subtracting 435 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 8:
87 goes into 850 9 times with a remainder of 67.
The next digit of our result is 9. 
Result so far: 10119.59
If we take 783 away from 850, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 9:
87 can be fit into 670 7 times, resulting in a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 10119.597
If we take 609 away from 670, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 10:
610 divided by 87 is 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 10119.5977
If we subtract 609 from 610, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The quotient of the division is 10119.5977, and the remainder is 1e-05.