Let's divide 720921 by 42
We want to divide 720921 by 42.

Step 1:
The number 42 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 42

Going ahead to step 2:
42 goes into 72 1 times with a remainder of 30.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 42 away from 72, we end up with 30.
Fetch the next digit (0) from the dividend, attach it to 30 and continue: 300 / 42

Step 3:
The number 42 fits into 300 7 times, leaving a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 17.0
Subtracting 294 from 300 leaves us with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 42

Let's proceed to step 4:
If we divide 69 by 42, we get 1 and a remainder of 27.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
If we subtract 42 from 69, we get 27.
Include the next digit (2) from the dividend after 27, then repeat: 272 / 42

Going ahead to step 5:
272 divided by 42 is 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 1716.0
Subtracting 252 from 272 leaves us with 20.
Include the next digit (1) from the dividend after 20, then repeat: 201 / 42

Going ahead to step 6:
42 goes into 201 4 times with a remainder of 33.
The number 4 becomes the next digit in our result. 
Result so far: 17164.0
The remainder is 33 after subtracting 168 from 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 7:
The number 42 fits into 330 7 times, leaving a remainder of 36.
The number 7 becomes the next digit in our result. 
Result so far: 17164.7
Subtracting 294 from 330 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 8:
The number 42 fits into 360 8 times, leaving a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 17164.78
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.

Advancing to step 9:
The number 42 fits into 240 5 times, leaving a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 17164.785
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.

On to step 10:
If we divide 300 by 42, we get 7 and a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 17164.7857
If we take 294 away from 300, we end up 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 11:
60 divided by 42 is 1 with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 17164.78571
Subtracting 42 from 60 leaves us 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.

Going ahead to step 12:
When dividing 180 by 42, we get 4 with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 17164.785714
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 13:
42 goes into 120 2 times with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 17164.7857142
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 14:
42 can be fit into 360 8 times, resulting in a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 17164.78571428
Deduct 336 from 360 and we're left 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.

In conclusion, the division gives 17164.78571428 with a balance of 2.4e-08.