542143 divided by 54 
The aim is to understand the frequency of 54 in 542143.

Step 1:
When dividing 5 by 54, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 54

Advancing to step 2:
54 goes into 54 1 times with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 54 from 54, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 54

Step 3:
The number 54 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 54

Let's proceed to step 4:
If we divide 21 by 54, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
Subtract 0 from 21 to get 21.
Bring next digit (4) of the dividend behind the 21 and repeat the process: 214 / 54

Step 5:
The number 54 fits into 214 3 times, leaving a remainder of 52.
Record the quotient 3 as the next digit in the result. 
Result so far: 1003.0
Subtract 162 from 214 to get 52.
Grab the next digit (3) from the dividend, add it to 52, then carry on: 523 / 54

Advancing to step 6:
523 divided by 54 is 9 with a remainder of 37.
Put 9 as the next digit of the answer. 
Result so far: 10039.0
If we take 486 away from 523, we end up 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.

Moving on to step 7:
When dividing 370 by 54, we get 6 with a remainder of 46.
Record the quotient 6 as the next digit in the result. 
Result so far: 10039.6
Subtracting 324 from 370 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 8:
460 divided by 54 is 8 with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 10039.68
The remainder is 28 after subtracting 432 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 9:
If we divide 280 by 54, we get 5 and a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 10039.685
If we take 270 away from 280, we end up 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.

Advancing to step 10:
When dividing 100 by 54, we get 1 with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 10039.6851
If we subtract 54 from 100, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
460 divided by 54 is 8 with a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 10039.68518
If we subtract 432 from 460, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 12:
If we divide 280 by 54, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 10039.685185
If we subtract 270 from 280, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
100 divided by 54 is 1 with a remainder of 46.
Write down 1 as next digit of the result. 
Result so far: 10039.6851851
If we take 54 away from 100, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 14:
54 can be fit into 460 8 times, resulting in a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 10039.68518518
If we take 432 away from 460, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 10039.68518518 and a remainder of 2.8e-08.