We're dividing 71042650 by 398 
The aim is to understand the frequency of 398 in 71042650.

Advancing to step 1:
When dividing 7 by 398, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 398

Step 2:
398 goes into 71 0 times with a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Fetch the next digit (0) from the dividend, attach it to 71 and continue: 710 / 398

On to step 3:
710 divided by 398 is 1 with a remainder of 312.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 398 from 710 leaves us with 312.
Bring next digit (4) of the dividend behind the 312 and repeat the process: 3124 / 398

On to step 4:
The number 398 fits into 3124 7 times, leaving a remainder of 338.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 2786 from 3124, we get 338.
Fetch the next digit (2) from the dividend, attach it to 338 and continue: 3382 / 398

Let's proceed to step 5:
When dividing 3382 by 398, we get 8 with a remainder of 198.
Put 8 as the next digit of the answer. 
Result so far: 178.0
Subtracting 3184 from 3382 leaves us with 198.
Bring next digit (6) of the dividend behind the 198 and repeat the process: 1986 / 398

Step 6:
398 can be fit into 1986 4 times, resulting in a remainder of 394.
Record the quotient 4 as the next digit in the result. 
Result so far: 1784.0
The remainder is 394 after subtracting 1592 from 1986.
Bring next digit (5) of the dividend behind the 394 and repeat the process: 3945 / 398

Going ahead to step 7:
3945 divided by 398 is 9 with a remainder of 363.
Put 9 as the next digit of the answer. 
Result so far: 17849.0
Deduct 3582 from 3945 and we're left with 363.
Bring next digit (0) of the dividend behind the 363 and repeat the process: 3630 / 398

Moving on to step 8:
When dividing 3630 by 398, we get 9 with a remainder of 48.
Put 9 as the next digit of the answer. 
Result so far: 178499.0
The remainder is 48 after subtracting 3582 from 3630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 9:
398 can be fit into 480 1 times, resulting in a remainder of 82.
Write down 1 as next digit of the result. 
Result so far: 178499.1
The remainder is 82 after subtracting 398 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 10:
If we divide 820 by 398, we get 2 and a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 178499.12
If we take 796 away from 820, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
240 divided by 398 is 0 with a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 178499.12
Deduct 0 from 240 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 12:
398 can be fit into 2400 6 times, resulting in a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 178499.1206
Subtracting 2388 from 2400 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
When dividing 120 by 398, we get 0 with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 178499.1206
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 14:
If we divide 1200 by 398, we get 3 and a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 178499.120603
If we take 1194 away from 1200, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 15:
When dividing 60 by 398, we get 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 178499.120603
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 16:
If we divide 600 by 398, we get 1 and a remainder of 202.
Put 1 as the next digit of the answer. 
Result so far: 178499.12060301
If we subtract 398 from 600, we get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Our division results in 178499.12060301 with a remaining 2.02e-07.