Let's divide 80561900 by 987
The aim is to understand the frequency of 987 in 80561900.

Moving on to step 1:
987 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 987

Let's proceed to step 2:
The number 987 fits into 80 0 times, leaving a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Include the next digit (5) from the dividend after 80, then repeat: 805 / 987

Step 3:
987 goes into 805 0 times with a remainder of 805.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 805 and we're left with 805.
Append the next digit (6) from the dividend to 805 and continue with: 8056 / 987

Let's proceed to step 4:
If we divide 8056 by 987, we get 8 and a remainder of 160.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 7896 from 8056 and we're left with 160.
Take the next digit (1) from the dividend and append it to 160, then repeat: 1601 / 987

Let's proceed to step 5:
The number 987 fits into 1601 1 times, leaving a remainder of 614.
Write down 1 as next digit of the result. 
Result so far: 81.0
The remainder is 614 after subtracting 987 from 1601.
Fetch the next digit (9) from the dividend, attach it to 614 and continue: 6149 / 987

Let's proceed to step 6:
987 can be fit into 6149 6 times, resulting in a remainder of 227.
Write down 6 as next digit of the result. 
Result so far: 816.0
If we subtract 5922 from 6149, we get 227.
Include the next digit (0) from the dividend after 227, then repeat: 2270 / 987

Going ahead to step 7:
2270 divided by 987 is 2 with a remainder of 296.
The number 2 becomes the next digit in our result. 
Result so far: 8162.0
If we take 1974 away from 2270, we end up with 296.
Fetch the next digit (0) from the dividend, attach it to 296 and continue: 2960 / 987

Advancing to step 8:
987 can be fit into 2960 2 times, resulting in a remainder of 986.
The number 2 becomes the next digit in our result. 
Result so far: 81622.0
Subtract 1974 from 2960 to get 986.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9860, and continue the process.

Step 9:
If we divide 9860 by 987, we get 9 and a remainder of 977.
Write down 9 as next digit of the result. 
Result so far: 81622.9
If we take 8883 away from 9860, we end up with 977.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9770, and continue the process.

Going ahead to step 10:
9770 divided by 987 is 9 with a remainder of 887.
Use 9 as the next digit of our solution. 
Result so far: 81622.99
Deduct 8883 from 9770 and we're left with 887.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8870, and continue the process.

After the division, we end up with 81622.99 and a remainder of 0.887.