We're dividing 64258921 by 345 
The aim is to understand the frequency of 345 in 64258921.

Going ahead to step 1:
The number 345 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 345

Step 2:
If we divide 64 by 345, we get 0 and a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (2) from the dividend after 64, then repeat: 642 / 345

Advancing to step 3:
345 can be fit into 642 1 times, resulting in a remainder of 297.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 345 from 642 and we're left with 297.
Bring next digit (5) of the dividend behind the 297 and repeat the process: 2975 / 345

Let's proceed to step 4:
If we divide 2975 by 345, we get 8 and a remainder of 215.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
The remainder is 215 after subtracting 2760 from 2975.
Bring next digit (8) of the dividend behind the 215 and repeat the process: 2158 / 345

Advancing to step 5:
The number 345 fits into 2158 6 times, leaving a remainder of 88.
The number 6 becomes the next digit in our result. 
Result so far: 186.0
Subtract 2070 from 2158 to get 88.
Include the next digit (9) from the dividend after 88, then repeat: 889 / 345

Advancing to step 6:
345 can be fit into 889 2 times, resulting in a remainder of 199.
The next digit of our result is 2. 
Result so far: 1862.0
The remainder is 199 after subtracting 690 from 889.
Fetch the next digit (2) from the dividend, attach it to 199 and continue: 1992 / 345

Advancing to step 7:
The number 345 fits into 1992 5 times, leaving a remainder of 267.
Write down 5 as next digit of the result. 
Result so far: 18625.0
If we subtract 1725 from 1992, we get 267.
Take the next digit (1) from the dividend and append it to 267, then repeat: 2671 / 345

Moving on to step 8:
When dividing 2671 by 345, we get 7 with a remainder of 256.
Put 7 as the next digit of the answer. 
Result so far: 186257.0
Deduct 2415 from 2671 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 9:
345 can be fit into 2560 7 times, resulting in a remainder of 145.
Write down 7 as next digit of the result. 
Result so far: 186257.7
If we subtract 2415 from 2560, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

On to step 10:
1450 divided by 345 is 4 with a remainder of 70.
The next digit of our result is 4. 
Result so far: 186257.74
Deduct 1380 from 1450 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 11:
The number 345 fits into 700 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 186257.742
Subtracting 690 from 700 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
If we divide 100 by 345, we get 0 and a remainder of 100.
The next digit of our result is 0. 
Result so far: 186257.742
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 13:
1000 divided by 345 is 2 with a remainder of 310.
The number 2 becomes the next digit in our result. 
Result so far: 186257.74202
If we take 690 away from 1000, we end up with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Going ahead to step 14:
3100 divided by 345 is 8 with a remainder of 340.
Record the quotient 8 as the next digit in the result. 
Result so far: 186257.742028
Subtract 2760 from 3100 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 15:
345 can be fit into 3400 9 times, resulting in a remainder of 295.
The next digit of our result is 9. 
Result so far: 186257.7420289
If we take 3105 away from 3400, we end up with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Let's proceed to step 16:
345 goes into 2950 8 times with a remainder of 190.
Put 8 as the next digit of the answer. 
Result so far: 186257.74202898
If we take 2760 away from 2950, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

In conclusion, the division gives 186257.74202898 with a balance of 1.9e-07.