43421 divided by 80 
We want to divide 43421 by 80.

On to step 1:
When dividing 4 by 80, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 80

Step 2:
80 can be fit into 43 0 times, resulting in a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Take the next digit (4) from the dividend and append it to 43, then repeat: 434 / 80

Let's proceed to step 3:
If we divide 434 by 80, we get 5 and a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 400 away from 434, we end up with 34.
Grab the next digit (2) from the dividend, add it to 34, then carry on: 342 / 80

On to step 4:
342 divided by 80 is 4 with a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 54.0
If we take 320 away from 342, we end up with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 80

Advancing to step 5:
80 can be fit into 221 2 times, resulting in a remainder of 61.
Write down 2 as next digit of the result. 
Result so far: 542.0
Subtract 160 from 221 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 6:
If we divide 610 by 80, we get 7 and a remainder of 50.
The number 7 becomes the next digit in our result. 
Result so far: 542.7
If we take 560 away from 610, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 7:
500 divided by 80 is 6 with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 542.76
Subtract 480 from 500 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
200 divided by 80 is 2 with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 542.762
Subtract 160 from 200 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
If we divide 400 by 80, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 542.7625
If we subtract 400 from 400, we 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.

Let's proceed to step 10:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 542.7625
Subtracting 0 from 0 leaves us 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.

Going ahead to step 11:
80 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 542.7625
If we take 0 away from 0, 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.

In conclusion, the division gives 542.7625 with a balance of 0.0.