21603834 ÷ 575 
Our goal is to divide 21603834 by 575.

On to step 1:
575 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 575

Advancing to step 2:
575 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 575

Step 3:
When dividing 216 by 575, we get 0 with a remainder of 216.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 216 to get 216.
Grab the next digit (0) from the dividend, add it to 216, then carry on: 2160 / 575

On to step 4:
2160 divided by 575 is 3 with a remainder of 435.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1725 from 2160, we get 435.
Bring next digit (3) of the dividend behind the 435 and repeat the process: 4353 / 575

Moving on to step 5:
4353 divided by 575 is 7 with a remainder of 328.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtract 4025 from 4353 to get 328.
Bring next digit (8) of the dividend behind the 328 and repeat the process: 3288 / 575

On to step 6:
The number 575 fits into 3288 5 times, leaving a remainder of 413.
Use 5 as the next digit of our solution. 
Result so far: 375.0
The remainder is 413 after subtracting 2875 from 3288.
Grab the next digit (3) from the dividend, add it to 413, then carry on: 4133 / 575

Moving on to step 7:
If we divide 4133 by 575, we get 7 and a remainder of 108.
Put 7 as the next digit of the answer. 
Result so far: 3757.0
The remainder is 108 after subtracting 4025 from 4133.
Append the next digit (4) from the dividend to 108 and continue with: 1084 / 575

Let's proceed to step 8:
575 can be fit into 1084 1 times, resulting in a remainder of 509.
Write down 1 as next digit of the result. 
Result so far: 37571.0
The remainder is 509 after subtracting 575 from 1084.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 9:
The number 575 fits into 5090 8 times, leaving a remainder of 490.
The next digit of our result is 8. 
Result so far: 37571.8
Deduct 4600 from 5090 and we're left with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Moving on to step 10:
The number 575 fits into 4900 8 times, leaving a remainder of 300.
The next digit of our result is 8. 
Result so far: 37571.88
Subtracting 4600 from 4900 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

After the division, we end up with 37571.88 and a remainder of 0.3.