We're dividing 66848372 by 398 
The aim is to understand the frequency of 398 in 66848372.

Step 1:
When dividing 6 by 398, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 398

Advancing to step 2:
If we divide 66 by 398, we get 0 and a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (8) from the dividend, add it to 66, then carry on: 668 / 398

Moving on to step 3:
When dividing 668 by 398, we get 1 with a remainder of 270.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 398 from 668, we get 270.
Take the next digit (4) from the dividend and append it to 270, then repeat: 2704 / 398

Advancing to step 4:
If we divide 2704 by 398, we get 6 and a remainder of 316.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we subtract 2388 from 2704, we get 316.
Grab the next digit (8) from the dividend, add it to 316, then carry on: 3168 / 398

Moving on to step 5:
When dividing 3168 by 398, we get 7 with a remainder of 382.
Put 7 as the next digit of the answer. 
Result so far: 167.0
Subtracting 2786 from 3168 leaves us with 382.
Bring next digit (3) of the dividend behind the 382 and repeat the process: 3823 / 398

Going ahead to step 6:
If we divide 3823 by 398, we get 9 and a remainder of 241.
The number 9 becomes the next digit in our result. 
Result so far: 1679.0
If we take 3582 away from 3823, we end up with 241.
Take the next digit (7) from the dividend and append it to 241, then repeat: 2417 / 398

Moving on to step 7:
When dividing 2417 by 398, we get 6 with a remainder of 29.
Record the quotient 6 as the next digit in the result. 
Result so far: 16796.0
If we subtract 2388 from 2417, we get 29.
Take the next digit (2) from the dividend and append it to 29, then repeat: 292 / 398

Let's proceed to step 8:
398 can be fit into 292 0 times, resulting in a remainder of 292.
Put 0 as the next digit of the answer. 
Result so far: 167960.0
The remainder is 292 after subtracting 0 from 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

On to step 9:
The number 398 fits into 2920 7 times, leaving a remainder of 134.
The number 7 becomes the next digit in our result. 
Result so far: 167960.7
Subtract 2786 from 2920 to get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Let's proceed to step 10:
The number 398 fits into 1340 3 times, leaving a remainder of 146.
Record the quotient 3 as the next digit in the result. 
Result so far: 167960.73
If we take 1194 away from 1340, we end up with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 11:
The number 398 fits into 1460 3 times, leaving a remainder of 266.
Write down 3 as next digit of the result. 
Result so far: 167960.733
Subtracting 1194 from 1460 leaves us with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Our division results in 167960.733 with a remaining 0.0266.