21384113 ÷ 57 
The aim is to understand the frequency of 57 in 21384113.

Going ahead to step 1:
If we divide 2 by 57, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 57

Advancing to step 2:
When dividing 21 by 57, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 57

On to step 3:
57 goes into 213 3 times with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 171 away from 213, we end up with 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 57

Step 4:
When dividing 428 by 57, we get 7 with a remainder of 29.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtract 399 from 428 to get 29.
Grab the next digit (4) from the dividend, add it to 29, then carry on: 294 / 57

Let's proceed to step 5:
57 goes into 294 5 times with a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 375.0
If we subtract 285 from 294, we get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 57

Step 6:
57 can be fit into 91 1 times, resulting in a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 3751.0
If we take 57 away from 91, we end up with 34.
Bring next digit (1) of the dividend behind the 34 and repeat the process: 341 / 57

On to step 7:
341 divided by 57 is 5 with a remainder of 56.
The number 5 becomes the next digit in our result. 
Result so far: 37515.0
If we take 285 away from 341, we end up with 56.
Grab the next digit (3) from the dividend, add it to 56, then carry on: 563 / 57

Advancing to step 8:
The number 57 fits into 563 9 times, leaving a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 375159.0
If we take 513 away from 563, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 9:
500 divided by 57 is 8 with a remainder of 44.
Write down 8 as next digit of the result. 
Result so far: 375159.8
Subtract 456 from 500 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 10:
When dividing 440 by 57, we get 7 with a remainder of 41.
The next digit of our result is 7. 
Result so far: 375159.87
If we take 399 away from 440, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 11:
The number 57 fits into 410 7 times, leaving a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 375159.877
If we take 399 away from 410, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Our division results in 375159.877 with a remaining 0.0011.