903215 divided by 42 
We want to divide 903215 by 42.

Going ahead to step 1:
9 divided by 42 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 42

Going ahead to step 2:
The number 42 fits into 90 2 times, leaving a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 84 from 90, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 42

Step 3:
When dividing 63 by 42, we get 1 with a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtracting 42 from 63 leaves us with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 42

On to step 4:
If we divide 212 by 42, we get 5 and a remainder of 2.
The next digit of our result is 5. 
Result so far: 215.0
If we take 210 away from 212, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 42

Going ahead to step 5:
The number 42 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 2150.0
Subtract 0 from 21 to get 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 42

Moving on to step 6:
215 divided by 42 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 21505.0
Deduct 210 from 215 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
50 divided by 42 is 1 with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 21505.1
Deduct 42 from 50 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
42 can be fit into 80 1 times, resulting in a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 21505.11
Subtract 42 from 80 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 21505.11 with a remaining 0.038.