Let's divide 433145 by 21
We're looking to find how many times 21 goes into 433145.

On to step 1:
21 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 21

Let's proceed to step 2:
The number 21 fits into 43 2 times, leaving a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 42 from 43 leaves us with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 21

Advancing to step 3:
The number 21 fits into 13 0 times, leaving a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtract 0 from 13 to get 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 21

Advancing to step 4:
21 can be fit into 131 6 times, resulting in a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 206.0
The remainder is 5 after subtracting 126 from 131.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 21

Advancing to step 5:
54 divided by 21 is 2 with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 2062.0
The remainder is 12 after subtracting 42 from 54.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 21

Advancing to step 6:
If we divide 125 by 21, we get 5 and a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 20625.0
Subtracting 105 from 125 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
If we divide 200 by 21, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 20625.9
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 8:
When dividing 110 by 21, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 20625.95
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
If we divide 50 by 21, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 20625.952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
When dividing 80 by 21, we get 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 20625.9523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 11:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 20625.95238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 12:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 20625.95238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 13:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 20625.9523809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 14:
110 divided by 21 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 20625.95238095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 20625.95238095 and a remainder of 5e-09.