Let's divide 575323 by 21
Let's see how many times 21 fits into 575323.

Going ahead to step 1:
21 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 21

Going ahead to step 2:
When dividing 57 by 21, we get 2 with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 42 from 57 to get 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 21

Advancing to step 3:
The number 21 fits into 155 7 times, leaving a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 27.0
The remainder is 8 after subtracting 147 from 155.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 21

Let's proceed to step 4:
If we divide 83 by 21, we get 3 and a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 273.0
Deduct 63 from 83 and we're left with 20.
Fetch the next digit (2) from the dividend, attach it to 20 and continue: 202 / 21

Moving on to step 5:
The number 21 fits into 202 9 times, leaving a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 2739.0
Subtracting 189 from 202 leaves us with 13.
Include the next digit (3) from the dividend after 13, then repeat: 133 / 21

Step 6:
If we divide 133 by 21, we get 6 and a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 27396.0
If we take 126 away from 133, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
When dividing 70 by 21, we get 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 27396.3
Subtracting 63 from 70 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 8:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 27396.33
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The quotient of the division is 27396.33, and the remainder is 0.007.