488233 divided by 21 
We're looking to find how many times 21 goes into 488233.

Advancing to step 1:
21 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 21

Let's proceed to step 2:
48 divided by 21 is 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 6 after subtracting 42 from 48.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 21

On to step 3:
If we divide 68 by 21, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Subtracting 63 from 68 leaves us with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 21

Let's proceed to step 4:
21 goes into 52 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 232.0
If we take 42 away from 52, we end up with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 21

Advancing to step 5:
The number 21 fits into 103 4 times, leaving a remainder of 19.
The next digit of our result is 4. 
Result so far: 2324.0
If we subtract 84 from 103, we get 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 21

Let's proceed to step 6:
21 can be fit into 193 9 times, resulting in a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 23249.0
Deduct 189 from 193 and we're left 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.

On to step 7:
21 goes into 40 1 times with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 23249.1
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 8:
If we divide 190 by 21, we get 9 and a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 23249.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
If we divide 10 by 21, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 23249.19
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
If we divide 100 by 21, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 23249.1904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 23249.19047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
If we divide 130 by 21, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 23249.190476
Deduct 126 from 130 and we're left 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.

Advancing to step 13:
When dividing 40 by 21, we get 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 23249.1904761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 14:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 23249.19047619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 23249.19047619 with a balance of 1e-09.