20866450 ÷ 487 
The aim is to understand the frequency of 487 in 20866450.

Step 1:
The number 487 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 487

Moving on to step 2:
The number 487 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Bring next digit (8) of the dividend behind the 20 and repeat the process: 208 / 487

Going ahead to step 3:
487 can be fit into 208 0 times, resulting in a remainder of 208.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 208, we get 208.
Grab the next digit (6) from the dividend, add it to 208, then carry on: 2086 / 487

Advancing to step 4:
When dividing 2086 by 487, we get 4 with a remainder of 138.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 1948 from 2086 and we're left with 138.
Append the next digit (6) from the dividend to 138 and continue with: 1386 / 487

Step 5:
1386 divided by 487 is 2 with a remainder of 412.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we subtract 974 from 1386, we get 412.
Include the next digit (4) from the dividend after 412, then repeat: 4124 / 487

Advancing to step 6:
4124 divided by 487 is 8 with a remainder of 228.
Record the quotient 8 as the next digit in the result. 
Result so far: 428.0
Deduct 3896 from 4124 and we're left with 228.
Take the next digit (5) from the dividend and append it to 228, then repeat: 2285 / 487

On to step 7:
2285 divided by 487 is 4 with a remainder of 337.
Put 4 as the next digit of the answer. 
Result so far: 4284.0
If we subtract 1948 from 2285, we get 337.
Grab the next digit (0) from the dividend, add it to 337, then carry on: 3370 / 487

Going ahead to step 8:
3370 divided by 487 is 6 with a remainder of 448.
The number 6 becomes the next digit in our result. 
Result so far: 42846.0
If we take 2922 away from 3370, we end up with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Step 9:
When dividing 4480 by 487, we get 9 with a remainder of 97.
Record the quotient 9 as the next digit in the result. 
Result so far: 42846.9
Subtracting 4383 from 4480 leaves us with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

On to step 10:
If we divide 970 by 487, we get 1 and a remainder of 483.
Record the quotient 1 as the next digit in the result. 
Result so far: 42846.91
Subtract 487 from 970 to get 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Going ahead to step 11:
487 goes into 4830 9 times with a remainder of 447.
Record the quotient 9 as the next digit in the result. 
Result so far: 42846.919
The remainder is 447 after subtracting 4383 from 4830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Advancing to step 12:
When dividing 4470 by 487, we get 9 with a remainder of 87.
Record the quotient 9 as the next digit in the result. 
Result so far: 42846.9199
The remainder is 87 after subtracting 4383 from 4470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

After the division, we end up with 42846.9199 and a remainder of 0.00087.