We're dividing 646370 by 57 
The aim is to understand the frequency of 57 in 646370.

Advancing to step 1:
If we divide 6 by 57, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 57

Let's proceed to step 2:
57 can be fit into 64 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 57 from 64 to get 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 57

On to step 3:
57 can be fit into 76 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 57 from 76 leaves us with 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 57

Moving on to step 4:
The number 57 fits into 193 3 times, leaving a remainder of 22.
The next digit of our result is 3. 
Result so far: 113.0
If we subtract 171 from 193, we get 22.
Take the next digit (7) from the dividend and append it to 22, then repeat: 227 / 57

Let's proceed to step 5:
57 can be fit into 227 3 times, resulting in a remainder of 56.
The number 3 becomes the next digit in our result. 
Result so far: 1133.0
Deduct 171 from 227 and we're left with 56.
Bring next digit (0) of the dividend behind the 56 and repeat the process: 560 / 57

Moving on to step 6:
560 divided by 57 is 9 with a remainder of 47.
Put 9 as the next digit of the answer. 
Result so far: 11339.0
Deduct 513 from 560 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
57 can be fit into 470 8 times, resulting in a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 11339.8
The remainder is 14 after subtracting 456 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
The number 57 fits into 140 2 times, leaving a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 11339.82
Subtract 114 from 140 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
57 can be fit into 260 4 times, resulting in a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 11339.824
If we take 228 away from 260, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
When dividing 320 by 57, we get 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 11339.8245
If we subtract 285 from 320, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 11:
The number 57 fits into 350 6 times, leaving a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 11339.82456
Deduct 342 from 350 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
If we divide 80 by 57, we get 1 and a remainder of 23.
The number 1 becomes the next digit in our result. 
Result so far: 11339.824561
If we take 57 away from 80, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 13:
When dividing 230 by 57, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 11339.8245614
Subtract 228 from 230 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
The number 57 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 11339.8245614
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 11339.8245614 with a balance of 2e-08.