Let's divide 34384289 by 421
The aim is to understand the frequency of 421 in 34384289.

Step 1:
421 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 421

Let's proceed to step 2:
When dividing 34 by 421, we get 0 with a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Include the next digit (3) from the dividend after 34, then repeat: 343 / 421

Going ahead to step 3:
421 goes into 343 0 times with a remainder of 343.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 343, we end up with 343.
Grab the next digit (8) from the dividend, add it to 343, then carry on: 3438 / 421

Going ahead to step 4:
When dividing 3438 by 421, we get 8 with a remainder of 70.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 70 after subtracting 3368 from 3438.
Bring next digit (4) of the dividend behind the 70 and repeat the process: 704 / 421

On to step 5:
421 can be fit into 704 1 times, resulting in a remainder of 283.
Write down 1 as next digit of the result. 
Result so far: 81.0
Deduct 421 from 704 and we're left with 283.
Fetch the next digit (2) from the dividend, attach it to 283 and continue: 2832 / 421

On to step 6:
2832 divided by 421 is 6 with a remainder of 306.
Use 6 as the next digit of our solution. 
Result so far: 816.0
Deduct 2526 from 2832 and we're left with 306.
Include the next digit (8) from the dividend after 306, then repeat: 3068 / 421

Moving on to step 7:
421 can be fit into 3068 7 times, resulting in a remainder of 121.
Put 7 as the next digit of the answer. 
Result so far: 8167.0
If we take 2947 away from 3068, we end up with 121.
Include the next digit (9) from the dividend after 121, then repeat: 1219 / 421

Let's proceed to step 8:
The number 421 fits into 1219 2 times, leaving a remainder of 377.
The number 2 becomes the next digit in our result. 
Result so far: 81672.0
The remainder is 377 after subtracting 842 from 1219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

On to step 9:
421 goes into 3770 8 times with a remainder of 402.
Record the quotient 8 as the next digit in the result. 
Result so far: 81672.8
The remainder is 402 after subtracting 3368 from 3770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Step 10:
The number 421 fits into 4020 9 times, leaving a remainder of 231.
Put 9 as the next digit of the answer. 
Result so far: 81672.89
If we take 3789 away from 4020, we end up with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Going ahead to step 11:
If we divide 2310 by 421, we get 5 and a remainder of 205.
Write down 5 as next digit of the result. 
Result so far: 81672.895
If we take 2105 away from 2310, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Moving on to step 12:
When dividing 2050 by 421, we get 4 with a remainder of 366.
Use 4 as the next digit of our solution. 
Result so far: 81672.8954
If we take 1684 away from 2050, we end up with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 13:
421 goes into 3660 8 times with a remainder of 292.
Record the quotient 8 as the next digit in the result. 
Result so far: 81672.89548
If we subtract 3368 from 3660, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Advancing to step 14:
When dividing 2920 by 421, we get 6 with a remainder of 394.
Write down 6 as next digit of the result. 
Result so far: 81672.895486
Subtract 2526 from 2920 to get 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Going ahead to step 15:
421 goes into 3940 9 times with a remainder of 151.
The number 9 becomes the next digit in our result. 
Result so far: 81672.8954869
If we subtract 3789 from 3940, we get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Moving on to step 16:
The number 421 fits into 1510 3 times, leaving a remainder of 247.
Write down 3 as next digit of the result. 
Result so far: 81672.89548693
The remainder is 247 after subtracting 1263 from 1510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

The final result is 81672.89548693 with a remainder of 2.47e-07.