We divide 721135 by 42
We want to divide 721135 by 42.

Moving on to step 1:
When dividing 7 by 42, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 42

On to step 2:
The number 42 fits into 72 1 times, leaving a remainder of 30.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 42 from 72, we get 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 42

Going ahead to step 3:
301 divided by 42 is 7 with a remainder of 7.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 294 from 301 leaves us with 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 42

Let's proceed to step 4:
42 can be fit into 71 1 times, resulting in a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
If we subtract 42 from 71, we get 29.
Include the next digit (3) from the dividend after 29, then repeat: 293 / 42

On to step 5:
If we divide 293 by 42, we get 6 and a remainder of 41.
The number 6 becomes the next digit in our result. 
Result so far: 1716.0
If we subtract 252 from 293, we get 41.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 42

Step 6:
The number 42 fits into 415 9 times, leaving a remainder of 37.
The next digit of our result is 9. 
Result so far: 17169.0
The remainder is 37 after subtracting 378 from 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 7:
The number 42 fits into 370 8 times, leaving a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 17169.8
Subtracting 336 from 370 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 8:
42 can be fit into 340 8 times, resulting in a remainder of 4.
The next digit of our result is 8. 
Result so far: 17169.88
Subtracting 336 from 340 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 17169.88 and a remainder of 0.004.