We divide 210816 by 54
The aim is to understand the frequency of 54 in 210816.

Advancing to step 1:
54 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 54

Step 2:
21 divided by 54 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 54

Advancing to step 3:
If we divide 210 by 54, we get 3 and a remainder of 48.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 48 after subtracting 162 from 210.
Fetch the next digit (8) from the dividend, attach it to 48 and continue: 488 / 54

Going ahead to step 4:
If we divide 488 by 54, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we take 486 away from 488, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 54

Step 5:
54 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 390.0
Deduct 0 from 21 and we're left with 21.
Bring next digit (6) of the dividend behind the 21 and repeat the process: 216 / 54

Going ahead to step 6:
When dividing 216 by 54, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 3904.0
Deduct 216 from 216 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
54 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3904.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
54 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3904.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 3904.0, with a leftover of 0.0.