We're dividing 51266171 by 543 
The aim is to understand the frequency of 543 in 51266171.

Let's proceed to step 1:
543 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 543

On to step 2:
If we divide 51 by 543, we get 0 and a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Include the next digit (2) from the dividend after 51, then repeat: 512 / 543

Let's proceed to step 3:
The number 543 fits into 512 0 times, leaving a remainder of 512.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 512 after subtracting 0 from 512.
Include the next digit (6) from the dividend after 512, then repeat: 5126 / 543

Advancing to step 4:
5126 divided by 543 is 9 with a remainder of 239.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 4887 from 5126 leaves us with 239.
Grab the next digit (6) from the dividend, add it to 239, then carry on: 2396 / 543

Going ahead to step 5:
The number 543 fits into 2396 4 times, leaving a remainder of 224.
The number 4 becomes the next digit in our result. 
Result so far: 94.0
Subtract 2172 from 2396 to get 224.
Bring next digit (1) of the dividend behind the 224 and repeat the process: 2241 / 543

On to step 6:
If we divide 2241 by 543, we get 4 and a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 944.0
Subtracting 2172 from 2241 leaves us with 69.
Take the next digit (7) from the dividend and append it to 69, then repeat: 697 / 543

Going ahead to step 7:
543 goes into 697 1 times with a remainder of 154.
Record the quotient 1 as the next digit in the result. 
Result so far: 9441.0
If we take 543 away from 697, we end up with 154.
Take the next digit (1) from the dividend and append it to 154, then repeat: 1541 / 543

On to step 8:
543 can be fit into 1541 2 times, resulting in a remainder of 455.
Put 2 as the next digit of the answer. 
Result so far: 94412.0
If we subtract 1086 from 1541, we get 455.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4550, and continue the process.

Let's proceed to step 9:
543 goes into 4550 8 times with a remainder of 206.
Put 8 as the next digit of the answer. 
Result so far: 94412.8
The remainder is 206 after subtracting 4344 from 4550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Moving on to step 10:
If we divide 2060 by 543, we get 3 and a remainder of 431.
Use 3 as the next digit of our solution. 
Result so far: 94412.83
If we take 1629 away from 2060, we end up with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Moving on to step 11:
543 can be fit into 4310 7 times, resulting in a remainder of 509.
Record the quotient 7 as the next digit in the result. 
Result so far: 94412.837
The remainder is 509 after subtracting 3801 from 4310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Step 12:
5090 divided by 543 is 9 with a remainder of 203.
The next digit of our result is 9. 
Result so far: 94412.8379
If we take 4887 away from 5090, we end up with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 13:
If we divide 2030 by 543, we get 3 and a remainder of 401.
Use 3 as the next digit of our solution. 
Result so far: 94412.83793
If we take 1629 away from 2030, we end up with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Let's proceed to step 14:
The number 543 fits into 4010 7 times, leaving a remainder of 209.
Use 7 as the next digit of our solution. 
Result so far: 94412.837937
Subtract 3801 from 4010 to get 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Moving on to step 15:
When dividing 2090 by 543, we get 3 with a remainder of 461.
Write down 3 as next digit of the result. 
Result so far: 94412.8379373
Subtracting 1629 from 2090 leaves us with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

On to step 16:
If we divide 4610 by 543, we get 8 and a remainder of 266.
The next digit of our result is 8. 
Result so far: 94412.83793738
If we take 4344 away from 4610, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

The quotient of the division is 94412.83793738, and the remainder is 2.66e-07.