43210 ÷ 80 
We're looking to find how many times 80 goes into 43210.

Advancing to step 1:
80 goes into 4 0 times 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 / 80

Moving on to step 2:
The number 80 fits into 43 0 times, leaving a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Append the next digit (2) from the dividend to 43 and continue with: 432 / 80

Advancing to step 3:
80 goes into 432 5 times with a remainder of 32.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 400 away from 432, we end up with 32.
Append the next digit (1) from the dividend to 32 and continue with: 321 / 80

Step 4:
The number 80 fits into 321 4 times, leaving a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 54.0
Subtracting 320 from 321 leaves us with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 80

Advancing to step 5:
80 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 540.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 6:
If we divide 100 by 80, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 540.1
The remainder is 20 after subtracting 80 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 7:
80 goes into 200 2 times with a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 540.12
If we take 160 away from 200, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
400 divided by 80 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 540.125
If we take 400 away from 400, 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.

On to step 9:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 540.125
If we subtract 0 from 0, 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.

Step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 540.125
If we subtract 0 from 0, 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.

In conclusion, the division gives 540.125 with a balance of 0.0.