39498436 ÷ 121 
The aim is to understand the frequency of 121 in 39498436.

Step 1:
The number 121 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 121

Step 2:
39 divided by 121 is 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (4) from the dividend, add it to 39, then carry on: 394 / 121

Moving on to step 3:
When dividing 394 by 121, we get 3 with a remainder of 31.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 363 away from 394, we end up with 31.
Include the next digit (9) from the dividend after 31, then repeat: 319 / 121

Advancing to step 4:
The number 121 fits into 319 2 times, leaving a remainder of 77.
Write down 2 as next digit of the result. 
Result so far: 32.0
The remainder is 77 after subtracting 242 from 319.
Include the next digit (8) from the dividend after 77, then repeat: 778 / 121

Going ahead to step 5:
If we divide 778 by 121, we get 6 and a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 326.0
If we subtract 726 from 778, we get 52.
Bring next digit (4) of the dividend behind the 52 and repeat the process: 524 / 121

On to step 6:
The number 121 fits into 524 4 times, leaving a remainder of 40.
The next digit of our result is 4. 
Result so far: 3264.0
The remainder is 40 after subtracting 484 from 524.
Fetch the next digit (3) from the dividend, attach it to 40 and continue: 403 / 121

Step 7:
When dividing 403 by 121, we get 3 with a remainder of 40.
Put 3 as the next digit of the answer. 
Result so far: 32643.0
If we subtract 363 from 403, we get 40.
Fetch the next digit (6) from the dividend, attach it to 40 and continue: 406 / 121

Let's proceed to step 8:
The number 121 fits into 406 3 times, leaving a remainder of 43.
Use 3 as the next digit of our solution. 
Result so far: 326433.0
If we take 363 away from 406, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 9:
121 goes into 430 3 times with a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 326433.3
Subtracting 363 from 430 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 10:
If we divide 670 by 121, we get 5 and a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 326433.35
Subtract 605 from 670 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 11:
121 can be fit into 650 5 times, resulting in a remainder of 45.
The next digit of our result is 5. 
Result so far: 326433.355
If we subtract 605 from 650, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final result is 326433.355 with a remainder of 0.0045.