We divide 81874043 by 543
The aim is to understand the frequency of 543 in 81874043.

Going ahead to step 1:
543 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 543

Step 2:
543 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (8) from the dividend, attach it to 81 and continue: 818 / 543

On to step 3:
818 divided by 543 is 1 with a remainder of 275.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 543 from 818 leaves us with 275.
Include the next digit (7) from the dividend after 275, then repeat: 2757 / 543

Moving on to step 4:
543 can be fit into 2757 5 times, resulting in a remainder of 42.
Use 5 as the next digit of our solution. 
Result so far: 15.0
If we take 2715 away from 2757, we end up with 42.
Grab the next digit (4) from the dividend, add it to 42, then carry on: 424 / 543

Step 5:
If we divide 424 by 543, we get 0 and a remainder of 424.
The number 0 becomes the next digit in our result. 
Result so far: 150.0
If we take 0 away from 424, we end up with 424.
Bring next digit (0) of the dividend behind the 424 and repeat the process: 4240 / 543

Advancing to step 6:
When dividing 4240 by 543, we get 7 with a remainder of 439.
The next digit of our result is 7. 
Result so far: 1507.0
Subtract 3801 from 4240 to get 439.
Take the next digit (4) from the dividend and append it to 439, then repeat: 4394 / 543

Going ahead to step 7:
The number 543 fits into 4394 8 times, leaving a remainder of 50.
The number 8 becomes the next digit in our result. 
Result so far: 15078.0
Deduct 4344 from 4394 and we're left with 50.
Include the next digit (3) from the dividend after 50, then repeat: 503 / 543

Advancing to step 8:
The number 543 fits into 503 0 times, leaving a remainder of 503.
Record the quotient 0 as the next digit in the result. 
Result so far: 150780.0
Subtracting 0 from 503 leaves us with 503.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

Advancing to step 9:
543 can be fit into 5030 9 times, resulting in a remainder of 143.
The number 9 becomes the next digit in our result. 
Result so far: 150780.9
If we subtract 4887 from 5030, we get 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Moving on to step 10:
When dividing 1430 by 543, we get 2 with a remainder of 344.
Write down 2 as next digit of the result. 
Result so far: 150780.92
Subtracting 1086 from 1430 leaves us with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Step 11:
543 can be fit into 3440 6 times, resulting in a remainder of 182.
The next digit of our result is 6. 
Result so far: 150780.926
If we subtract 3258 from 3440, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 12:
If we divide 1820 by 543, we get 3 and a remainder of 191.
Write down 3 as next digit of the result. 
Result so far: 150780.9263
The remainder is 191 after subtracting 1629 from 1820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Moving on to step 13:
1910 divided by 543 is 3 with a remainder of 281.
Put 3 as the next digit of the answer. 
Result so far: 150780.92633
The remainder is 281 after subtracting 1629 from 1910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

The final outcome is 150780.92633, with a leftover of 0.000281.