We're dividing 541209 by 42 
We want to divide 541209 by 42.

Step 1:
42 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
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

Step 2:
If we divide 54 by 42, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 12 after subtracting 42 from 54.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 42

On to step 3:
42 can be fit into 121 2 times, resulting in a remainder of 37.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 37 after subtracting 84 from 121.
Take the next digit (2) from the dividend and append it to 37, then repeat: 372 / 42

Advancing to step 4:
When dividing 372 by 42, we get 8 with a remainder of 36.
The next digit of our result is 8. 
Result so far: 128.0
Subtract 336 from 372 to get 36.
Fetch the next digit (0) from the dividend, attach it to 36 and continue: 360 / 42

Moving on to step 5:
42 goes into 360 8 times with a remainder of 24.
The next digit of our result is 8. 
Result so far: 1288.0
Subtracting 336 from 360 leaves us with 24.
Append the next digit (9) from the dividend to 24 and continue with: 249 / 42

Let's proceed to step 6:
42 goes into 249 5 times with a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 12885.0
Subtract 210 from 249 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 7:
When dividing 390 by 42, we get 9 with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 12885.9
If we take 378 away from 390, we end up 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.

On to step 8:
When dividing 120 by 42, we get 2 with a remainder of 36.
The next digit of our result is 2. 
Result so far: 12885.92
Subtract 84 from 120 to get 36.
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 9:
If we divide 360 by 42, we get 8 and a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 12885.928
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
When dividing 240 by 42, we get 5 with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 12885.9285
If we take 210 away from 240, we end up 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.

Let's proceed to step 11:
42 goes into 300 7 times with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 12885.92857
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 12:
The number 42 fits into 60 1 times, leaving a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 12885.928571
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 13:
When dividing 180 by 42, we get 4 with a remainder of 12.
The next digit of our result is 4. 
Result so far: 12885.9285714
If we take 168 away from 180, we end up 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.

On to step 14:
When dividing 120 by 42, we get 2 with a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 12885.92857142
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final result is 12885.92857142 with a remainder of 3.6e-08.