We look at the division of 902439 by 42 
We're looking to find how many times 42 goes into 902439.

Advancing to step 1:
If we divide 9 by 42, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 42

Advancing to step 2:
The number 42 fits into 90 2 times, leaving a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 84 from 90 and we're left with 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 42

Moving on to step 3:
When dividing 62 by 42, we get 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we take 42 away from 62, we end up with 20.
Include the next digit (4) from the dividend after 20, then repeat: 204 / 42

Going ahead to step 4:
42 goes into 204 4 times with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 214.0
Deduct 168 from 204 and we're left with 36.
Bring next digit (3) of the dividend behind the 36 and repeat the process: 363 / 42

Going ahead to step 5:
If we divide 363 by 42, we get 8 and a remainder of 27.
Record the quotient 8 as the next digit in the result. 
Result so far: 2148.0
The remainder is 27 after subtracting 336 from 363.
Grab the next digit (9) from the dividend, add it to 27, then carry on: 279 / 42

Let's proceed to step 6:
279 divided by 42 is 6 with a remainder of 27.
Record the quotient 6 as the next digit in the result. 
Result so far: 21486.0
If we subtract 252 from 279, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 7:
42 can be fit into 270 6 times, resulting in a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 21486.6
Deduct 252 from 270 and we're left 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.

Let's proceed to step 8:
42 can be fit into 180 4 times, resulting in a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 21486.64
Subtract 168 from 180 to get 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 9:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 21486.642
If we subtract 84 from 120, we 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 10:
42 goes into 360 8 times with a remainder of 24.
The next digit of our result is 8. 
Result so far: 21486.6428
Subtract 336 from 360 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
When dividing 240 by 42, we get 5 with a remainder of 30.
The next digit of our result is 5. 
Result so far: 21486.64285
The remainder is 30 after subtracting 210 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
When dividing 300 by 42, we get 7 with a remainder of 6.
The next digit of our result is 7. 
Result so far: 21486.642857
Deduct 294 from 300 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
The number 42 fits into 60 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 21486.6428571
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 14:
180 divided by 42 is 4 with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 21486.64285714
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 21486.64285714 with a remainder of 1.2e-08.