72490 ÷ 57 
The aim is to understand the frequency of 57 in 72490.

On to step 1:
If we divide 7 by 57, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 57

Let's proceed to step 2:
72 divided by 57 is 1 with a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 57 from 72 to get 15.
Fetch the next digit (4) from the dividend, attach it to 15 and continue: 154 / 57

Going ahead to step 3:
If we divide 154 by 57, we get 2 and a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 114 from 154 and we're left with 40.
Grab the next digit (9) from the dividend, add it to 40, then carry on: 409 / 57

On to step 4:
The number 57 fits into 409 7 times, leaving a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 127.0
Subtract 399 from 409 to get 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 57

Advancing to step 5:
57 goes into 100 1 times with a remainder of 43.
Put 1 as the next digit of the answer. 
Result so far: 1271.0
Subtracting 57 from 100 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 6:
If we divide 430 by 57, we get 7 and a remainder of 31.
The next digit of our result is 7. 
Result so far: 1271.7
Subtracting 399 from 430 leaves us 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.

Let's proceed to step 7:
When dividing 310 by 57, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 1271.75
Subtracting 285 from 310 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 8:
If we divide 250 by 57, we get 4 and a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 1271.754
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.

Moving on to step 9:
When dividing 220 by 57, we get 3 with a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 1271.7543
If we subtract 171 from 220, we 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.

Moving on to step 10:
When dividing 490 by 57, we get 8 with a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 1271.75438
If we subtract 456 from 490, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 11:
The number 57 fits into 340 5 times, leaving a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 1271.754385
If we take 285 away from 340, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 12:
If we divide 550 by 57, we get 9 and a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 1271.7543859
Subtracting 513 from 550 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 13:
If we divide 370 by 57, we get 6 and a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 1271.75438596
The remainder is 28 after subtracting 342 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 1271.75438596, with a leftover of 2.8e-08.