435528 divided by 21 
We're looking to find how many times 21 goes into 435528.

Moving on to step 1:
When dividing 4 by 21, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 21

Moving on to step 2:
When dividing 43 by 21, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 42 from 43 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 21

Advancing to step 3:
When dividing 15 by 21, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 15, we get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 21

On to step 4:
21 can be fit into 155 7 times, resulting in a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 207.0
If we subtract 147 from 155, we get 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 21

Let's proceed to step 5:
When dividing 82 by 21, we get 3 with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 2073.0
Subtracting 63 from 82 leaves us with 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 21

Let's proceed to step 6:
21 can be fit into 198 9 times, resulting in a remainder of 9.
The next digit of our result is 9. 
Result so far: 20739.0
Subtracting 189 from 198 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 20739.4
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 20739.42
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
The number 21 fits into 180 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 20739.428
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
21 can be fit into 120 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 20739.4285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
150 divided by 21 is 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 20739.42857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 12:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 20739.428571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
90 divided by 21 is 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 20739.4285714
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 14:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 20739.42857142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The quotient of the division is 20739.42857142, and the remainder is 1.8e-08.