68457510 ÷ 489 
The aim is to understand the frequency of 489 in 68457510.

Step 1:
If we divide 6 by 489, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 489

Step 2:
68 divided by 489 is 0 with a remainder of 68.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Bring next digit (4) of the dividend behind the 68 and repeat the process: 684 / 489

Moving on to step 3:
If we divide 684 by 489, we get 1 and a remainder of 195.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 489 from 684 and we're left with 195.
Grab the next digit (5) from the dividend, add it to 195, then carry on: 1955 / 489

Let's proceed to step 4:
1955 divided by 489 is 3 with a remainder of 488.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1467 from 1955 and we're left with 488.
Include the next digit (7) from the dividend after 488, then repeat: 4887 / 489

Going ahead to step 5:
489 goes into 4887 9 times with a remainder of 486.
The number 9 becomes the next digit in our result. 
Result so far: 139.0
Deduct 4401 from 4887 and we're left with 486.
Bring next digit (5) of the dividend behind the 486 and repeat the process: 4865 / 489

Advancing to step 6:
If we divide 4865 by 489, we get 9 and a remainder of 464.
Write down 9 as next digit of the result. 
Result so far: 1399.0
If we subtract 4401 from 4865, we get 464.
Append the next digit (1) from the dividend to 464 and continue with: 4641 / 489

Advancing to step 7:
489 goes into 4641 9 times with a remainder of 240.
The number 9 becomes the next digit in our result. 
Result so far: 13999.0
Subtracting 4401 from 4641 leaves us with 240.
Take the next digit (0) from the dividend and append it to 240, then repeat: 2400 / 489

Moving on to step 8:
489 goes into 2400 4 times with a remainder of 444.
Record the quotient 4 as the next digit in the result. 
Result so far: 139994.0
Subtract 1956 from 2400 to get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Advancing to step 9:
If we divide 4440 by 489, we get 9 and a remainder of 39.
The number 9 becomes the next digit in our result. 
Result so far: 139994.9
Deduct 4401 from 4440 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 10:
390 divided by 489 is 0 with a remainder of 390.
Write down 0 as next digit of the result. 
Result so far: 139994.9
Subtract 0 from 390 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 11:
When dividing 3900 by 489, we get 7 with a remainder of 477.
Use 7 as the next digit of our solution. 
Result so far: 139994.907
Deduct 3423 from 3900 and we're left with 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

On to step 12:
489 goes into 4770 9 times with a remainder of 369.
Put 9 as the next digit of the answer. 
Result so far: 139994.9079
Subtract 4401 from 4770 to get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Going ahead to step 13:
3690 divided by 489 is 7 with a remainder of 267.
The next digit of our result is 7. 
Result so far: 139994.90797
If we subtract 3423 from 3690, we get 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Let's proceed to step 14:
489 can be fit into 2670 5 times, resulting in a remainder of 225.
Use 5 as the next digit of our solution. 
Result so far: 139994.907975
Deduct 2445 from 2670 and we're left with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

On to step 15:
If we divide 2250 by 489, we get 4 and a remainder of 294.
The next digit of our result is 4. 
Result so far: 139994.9079754
If we take 1956 away from 2250, we end up with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Step 16:
489 goes into 2940 6 times with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 139994.90797546
Deduct 2934 from 2940 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 139994.90797546, with a leftover of 6e-09.