We divide 43021790 by 21
Let's see how many times 21 fits into 43021790.

Advancing to step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 21

Let's proceed to step 2:
21 can be fit into 43 2 times, resulting in a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 42 away from 43, we end up with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 21

On to step 3:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtracting 0 from 10 leaves us with 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 21

On to step 4:
When dividing 102 by 21, we get 4 with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 204.0
Deduct 84 from 102 and we're left with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 21

Let's proceed to step 5:
When dividing 181 by 21, we get 8 with a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 2048.0
If we subtract 168 from 181, we get 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 21

On to step 6:
21 can be fit into 137 6 times, resulting in a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 20486.0
Subtracting 126 from 137 leaves us with 11.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 21

Going ahead to step 7:
21 can be fit into 119 5 times, resulting in a remainder of 14.
Use 5 as the next digit of our solution. 
Result so far: 204865.0
If we take 105 away from 119, we end up with 14.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 21

Let's proceed to step 8:
21 goes into 140 6 times with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 2048656.0
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
The number 21 fits into 140 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 2048656.6
The remainder is 14 after subtracting 126 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
When dividing 140 by 21, we get 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 2048656.66
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 2048656.66, with a leftover of 0.014.