87180479 divided by 5 
The aim is to understand the frequency of 5 in 87180479.

Step 1:
The number 5 fits into 8 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 5 from 8 to get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 5

Step 2:
5 can be fit into 37 7 times, resulting in a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we subtract 35 from 37, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 5

Advancing to step 3:
5 can be fit into 21 4 times, resulting in a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 174.0
Deduct 20 from 21 and we're left with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 5

Advancing to step 4:
If we divide 18 by 5, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 1743.0
If we take 15 away from 18, we end up with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 5

On to step 5:
30 divided by 5 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 17436.0
If we take 30 away from 30, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 5

Advancing to step 6:
4 divided by 5 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 174360.0
Subtract 0 from 4 to get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 5

On to step 7:
When dividing 47 by 5, we get 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 1743609.0
Deduct 45 from 47 and we're left with 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 5

Advancing to step 8:
5 goes into 29 5 times with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 17436095.0
If we take 25 away from 29, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
40 divided by 5 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 17436095.8
Deduct 40 from 40 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
0 divided by 5 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17436095.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
The number 5 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 17436095.8
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 17436095.8, and the remainder is 0.0.