359268 ÷ 21 
We want to figure out the number of times 359268 can be divided by 21.

Going ahead to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 21

On to step 2:
21 goes into 35 1 times with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 21 from 35 leaves us with 14.
Grab the next digit (9) from the dividend, add it to 14, then carry on: 149 / 21

Step 3:
If we divide 149 by 21, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 147 from 149 and we're left with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 21

On to step 4:
21 goes into 22 1 times with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
Deduct 21 from 22 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 21

On to step 5:
If we divide 16 by 21, we get 0 and a remainder of 16.
The next digit of our result is 0. 
Result so far: 1710.0
Subtracting 0 from 16 leaves us with 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 21

Moving on to step 6:
168 divided by 21 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 17108.0
If we take 168 away from 168, we end up 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.

Let's proceed to step 7:
0 divided by 21 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17108.0
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 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17108.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 17108.0 with a remaining 0.0.