89710997 divided by 123 
The aim is to understand the frequency of 123 in 89710997.

Let's proceed to step 1:
123 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 123

Advancing to step 2:
When dividing 89 by 123, we get 0 with a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 89 and we're left with 89.
Append the next digit (7) from the dividend to 89 and continue with: 897 / 123

Step 3:
When dividing 897 by 123, we get 7 with a remainder of 36.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 861 from 897 leaves us with 36.
Take the next digit (1) from the dividend and append it to 36, then repeat: 361 / 123

Moving on to step 4:
The number 123 fits into 361 2 times, leaving a remainder of 115.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
Deduct 246 from 361 and we're left with 115.
Include the next digit (0) from the dividend after 115, then repeat: 1150 / 123

Going ahead to step 5:
123 can be fit into 1150 9 times, resulting in a remainder of 43.
Put 9 as the next digit of the answer. 
Result so far: 729.0
Deduct 1107 from 1150 and we're left with 43.
Bring next digit (9) of the dividend behind the 43 and repeat the process: 439 / 123

Going ahead to step 6:
439 divided by 123 is 3 with a remainder of 70.
Use 3 as the next digit of our solution. 
Result so far: 7293.0
If we subtract 369 from 439, we get 70.
Include the next digit (9) from the dividend after 70, then repeat: 709 / 123

Advancing to step 7:
123 goes into 709 5 times with a remainder of 94.
The number 5 becomes the next digit in our result. 
Result so far: 72935.0
Subtract 615 from 709 to get 94.
Grab the next digit (7) from the dividend, add it to 94, then carry on: 947 / 123

Let's proceed to step 8:
If we divide 947 by 123, we get 7 and a remainder of 86.
Write down 7 as next digit of the result. 
Result so far: 729357.0
If we subtract 861 from 947, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 9:
860 divided by 123 is 6 with a remainder of 122.
Record the quotient 6 as the next digit in the result. 
Result so far: 729357.6
If we take 738 away from 860, we end up with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 10:
If we divide 1220 by 123, we get 9 and a remainder of 113.
The number 9 becomes the next digit in our result. 
Result so far: 729357.69
The remainder is 113 after subtracting 1107 from 1220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Advancing to step 11:
1130 divided by 123 is 9 with a remainder of 23.
Use 9 as the next digit of our solution. 
Result so far: 729357.699
If we subtract 1107 from 1130, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Our division results in 729357.699 with a remaining 0.0023.