We look at the division of 543810 by 42 
We want to figure out the number of times 543810 can be divided by 42.

Let's proceed to step 1:
42 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 42

On to step 2:
42 can be fit into 54 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 42 from 54, we get 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 42

On to step 3:
The number 42 fits into 123 2 times, leaving a remainder of 39.
The next digit of our result is 2. 
Result so far: 12.0
If we take 84 away from 123, we end up with 39.
Append the next digit (8) from the dividend to 39 and continue with: 398 / 42

Going ahead to step 4:
42 can be fit into 398 9 times, resulting in a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 129.0
The remainder is 20 after subtracting 378 from 398.
Grab the next digit (1) from the dividend, add it to 20, then carry on: 201 / 42

Step 5:
42 can be fit into 201 4 times, resulting in a remainder of 33.
Record the quotient 4 as the next digit in the result. 
Result so far: 1294.0
If we take 168 away from 201, we end up with 33.
Fetch the next digit (0) from the dividend, attach it to 33 and continue: 330 / 42

Step 6:
330 divided by 42 is 7 with a remainder of 36.
Write down 7 as next digit of the result. 
Result so far: 12947.0
The remainder is 36 after subtracting 294 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 7:
42 can be fit into 360 8 times, resulting in a remainder of 24.
The next digit of our result is 8. 
Result so far: 12947.8
If we take 336 away from 360, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 8:
The number 42 fits into 240 5 times, leaving a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 12947.85
Subtracting 210 from 240 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
When dividing 300 by 42, we get 7 with a remainder of 6.
The next digit of our result is 7. 
Result so far: 12947.857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 10:
The number 42 fits into 60 1 times, leaving a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 12947.8571
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 11:
If we divide 180 by 42, we get 4 and a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 12947.85714
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
120 divided by 42 is 2 with a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 12947.857142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 13:
360 divided by 42 is 8 with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 12947.8571428
If we take 336 away from 360, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
If we divide 240 by 42, we get 5 and a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 12947.85714285
Subtract 210 from 240 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 12947.85714285 and a remainder of 3e-08.