577243 divided by 57 
The aim is to understand the frequency of 57 in 577243.

Advancing to step 1:
When dividing 5 by 57, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 57

On to step 2:
When dividing 57 by 57, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 57 from 57 to get 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 57

Let's proceed to step 3:
When dividing 7 by 57, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 7 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 57

Step 4:
57 can be fit into 72 1 times, resulting in a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 57 from 72 leaves us with 15.
Fetch the next digit (4) from the dividend, attach it to 15 and continue: 154 / 57

Advancing to step 5:
When dividing 154 by 57, we get 2 with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 1012.0
Subtracting 114 from 154 leaves us with 40.
Append the next digit (3) from the dividend to 40 and continue with: 403 / 57

Let's proceed to step 6:
The number 57 fits into 403 7 times, leaving a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 10127.0
Deduct 399 from 403 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
57 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 10127.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
57 can be fit into 400 7 times, resulting in a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 10127.07
If we take 399 away from 400, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 9:
If we divide 10 by 57, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 10127.07
Subtracting 0 from 10 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 10:
When dividing 100 by 57, we get 1 with a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 10127.0701
The remainder is 43 after subtracting 57 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 11:
430 divided by 57 is 7 with a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 10127.07017
If we take 399 away from 430, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 12:
310 divided by 57 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 10127.070175
The remainder is 25 after subtracting 285 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 13:
57 can be fit into 250 4 times, resulting in a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 10127.0701754
If we take 228 away from 250, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 14:
If we divide 220 by 57, we get 3 and a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 10127.07017543
Subtract 171 from 220 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

After the division, we end up with 10127.07017543 and a remainder of 4.9e-08.