We divide 10787728 by 121
The aim is to understand the frequency of 121 in 10787728.

Going ahead to step 1:
When dividing 1 by 121, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 121

Advancing to step 2:
If we divide 10 by 121, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 121

Moving on to step 3:
When dividing 107 by 121, we get 0 with a remainder of 107.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 107 after subtracting 0 from 107.
Fetch the next digit (8) from the dividend, attach it to 107 and continue: 1078 / 121

Step 4:
The number 121 fits into 1078 8 times, leaving a remainder of 110.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 968 from 1078 and we're left with 110.
Bring next digit (7) of the dividend behind the 110 and repeat the process: 1107 / 121

Step 5:
The number 121 fits into 1107 9 times, leaving a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 89.0
Subtract 1089 from 1107 to get 18.
Bring next digit (7) of the dividend behind the 18 and repeat the process: 187 / 121

Step 6:
The number 121 fits into 187 1 times, leaving a remainder of 66.
The number 1 becomes the next digit in our result. 
Result so far: 891.0
Subtracting 121 from 187 leaves us with 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 121

Step 7:
121 can be fit into 662 5 times, resulting in a remainder of 57.
Put 5 as the next digit of the answer. 
Result so far: 8915.0
The remainder is 57 after subtracting 605 from 662.
Fetch the next digit (8) from the dividend, attach it to 57 and continue: 578 / 121

Going ahead to step 8:
When dividing 578 by 121, we get 4 with a remainder of 94.
Use 4 as the next digit of our solution. 
Result so far: 89154.0
Subtracting 484 from 578 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 9:
940 divided by 121 is 7 with a remainder of 93.
Use 7 as the next digit of our solution. 
Result so far: 89154.7
The remainder is 93 after subtracting 847 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 10:
930 divided by 121 is 7 with a remainder of 83.
The number 7 becomes the next digit in our result. 
Result so far: 89154.77
Deduct 847 from 930 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

After the division, we end up with 89154.77 and a remainder of 0.083.