We're dividing 80043604 by 402 
The aim is to understand the frequency of 402 in 80043604.

Moving on to step 1:
402 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 402

Going ahead to step 2:
When dividing 80 by 402, we get 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Take the next digit (0) from the dividend and append it to 80, then repeat: 800 / 402

Let's proceed to step 3:
When dividing 800 by 402, we get 1 with a remainder of 398.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 402 from 800 and we're left with 398.
Bring next digit (4) of the dividend behind the 398 and repeat the process: 3984 / 402

Step 4:
When dividing 3984 by 402, we get 9 with a remainder of 366.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we subtract 3618 from 3984, we get 366.
Include the next digit (3) from the dividend after 366, then repeat: 3663 / 402

On to step 5:
The number 402 fits into 3663 9 times, leaving a remainder of 45.
Put 9 as the next digit of the answer. 
Result so far: 199.0
Deduct 3618 from 3663 and we're left with 45.
Fetch the next digit (6) from the dividend, attach it to 45 and continue: 456 / 402

Advancing to step 6:
The number 402 fits into 456 1 times, leaving a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 1991.0
Deduct 402 from 456 and we're left with 54.
Fetch the next digit (0) from the dividend, attach it to 54 and continue: 540 / 402

Let's proceed to step 7:
When dividing 540 by 402, we get 1 with a remainder of 138.
Use 1 as the next digit of our solution. 
Result so far: 19911.0
If we subtract 402 from 540, we get 138.
Take the next digit (4) from the dividend and append it to 138, then repeat: 1384 / 402

Moving on to step 8:
When dividing 1384 by 402, we get 3 with a remainder of 178.
The number 3 becomes the next digit in our result. 
Result so far: 199113.0
Subtract 1206 from 1384 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Let's proceed to step 9:
When dividing 1780 by 402, we get 4 with a remainder of 172.
Use 4 as the next digit of our solution. 
Result so far: 199113.4
Deduct 1608 from 1780 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Moving on to step 10:
402 can be fit into 1720 4 times, resulting in a remainder of 112.
Record the quotient 4 as the next digit in the result. 
Result so far: 199113.44
If we subtract 1608 from 1720, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Our division results in 199113.44 with a remaining 0.112.