358323 divided by 21 
We're looking to find how many times 21 goes into 358323.

On to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 21

Step 2:
21 can be fit into 35 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 21 away from 35, we end up with 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 21

Moving on to step 3:
21 can be fit into 148 7 times, resulting in a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 147 from 148 and we're left with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 21

Step 4:
13 divided by 21 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 170.0
The remainder is 13 after subtracting 0 from 13.
Append the next digit (2) from the dividend to 13 and continue with: 132 / 21

Advancing to step 5:
21 goes into 132 6 times with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 1706.0
Deduct 126 from 132 and we're left with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 21

On to step 6:
The number 21 fits into 63 3 times, leaving a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 17063.0
The remainder is 0 after subtracting 63 from 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
The number 21 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 17063.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
21 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 17063.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 17063.0 with a balance of 0.0.