We divide 801880 by 87
The aim is to understand the frequency of 87 in 801880.

Let's proceed to step 1:
If we divide 8 by 87, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 87

On to step 2:
80 divided by 87 is 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 87

Going ahead to step 3:
If we divide 801 by 87, we get 9 and a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 783 from 801, we get 18.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 87

Going ahead to step 4:
The number 87 fits into 188 2 times, leaving a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 92.0
Subtract 174 from 188 to get 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 87

Advancing to step 5:
When dividing 148 by 87, we get 1 with a remainder of 61.
Record the quotient 1 as the next digit in the result. 
Result so far: 921.0
If we subtract 87 from 148, we get 61.
Append the next digit (0) from the dividend to 61 and continue with: 610 / 87

Going ahead to step 6:
610 divided by 87 is 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 9217.0
Subtract 609 from 610 to 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.

Advancing to step 7:
10 divided by 87 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 9217.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
100 divided by 87 is 1 with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 9217.01
Subtract 87 from 100 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 9:
If we divide 130 by 87, we get 1 and a remainder of 43.
The number 1 becomes the next digit in our result. 
Result so far: 9217.011
The remainder is 43 after subtracting 87 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final outcome is 9217.011, with a leftover of 0.0043.