We're dividing 90400964 by 543 
We're looking to find how many times 543 goes into 90400964.

Let's proceed to step 1:
When dividing 9 by 543, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 543

Let's proceed to step 2:
When dividing 90 by 543, we get 0 with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Grab the next digit (4) from the dividend, add it to 90, then carry on: 904 / 543

Going ahead to step 3:
543 can be fit into 904 1 times, resulting in a remainder of 361.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 543 from 904 and we're left with 361.
Grab the next digit (0) from the dividend, add it to 361, then carry on: 3610 / 543

Step 4:
543 goes into 3610 6 times with a remainder of 352.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtract 3258 from 3610 to get 352.
Take the next digit (0) from the dividend and append it to 352, then repeat: 3520 / 543

Advancing to step 5:
3520 divided by 543 is 6 with a remainder of 262.
Put 6 as the next digit of the answer. 
Result so far: 166.0
Subtracting 3258 from 3520 leaves us with 262.
Grab the next digit (9) from the dividend, add it to 262, then carry on: 2629 / 543

Going ahead to step 6:
When dividing 2629 by 543, we get 4 with a remainder of 457.
Put 4 as the next digit of the answer. 
Result so far: 1664.0
Subtracting 2172 from 2629 leaves us with 457.
Include the next digit (6) from the dividend after 457, then repeat: 4576 / 543

Moving on to step 7:
When dividing 4576 by 543, we get 8 with a remainder of 232.
The next digit of our result is 8. 
Result so far: 16648.0
Subtract 4344 from 4576 to get 232.
Bring next digit (4) of the dividend behind the 232 and repeat the process: 2324 / 543

Step 8:
2324 divided by 543 is 4 with a remainder of 152.
Put 4 as the next digit of the answer. 
Result so far: 166484.0
If we subtract 2172 from 2324, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 9:
The number 543 fits into 1520 2 times, leaving a remainder of 434.
Record the quotient 2 as the next digit in the result. 
Result so far: 166484.2
Subtract 1086 from 1520 to get 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Step 10:
If we divide 4340 by 543, we get 7 and a remainder of 539.
The number 7 becomes the next digit in our result. 
Result so far: 166484.27
If we subtract 3801 from 4340, we get 539.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5390, and continue the process.

Let's proceed to step 11:
The number 543 fits into 5390 9 times, leaving a remainder of 503.
The number 9 becomes the next digit in our result. 
Result so far: 166484.279
The remainder is 503 after subtracting 4887 from 5390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

On to step 12:
543 can be fit into 5030 9 times, resulting in a remainder of 143.
The next digit of our result is 9. 
Result so far: 166484.2799
Deduct 4887 from 5030 and we're left with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

The final result is 166484.2799 with a remainder of 0.00143.