729405 ÷ 80 
We're looking to find how many times 80 goes into 729405.

On to step 1:
80 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 80

On to step 2:
When dividing 72 by 80, we get 0 with a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 80

Step 3:
The number 80 fits into 729 9 times, leaving a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 720 away from 729, we end up with 9.
Append the next digit (4) from the dividend to 9 and continue with: 94 / 80

Going ahead to step 4:
The number 80 fits into 94 1 times, leaving a remainder of 14.
The next digit of our result is 1. 
Result so far: 91.0
If we subtract 80 from 94, we get 14.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 80

Advancing to step 5:
80 goes into 140 1 times with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 911.0
Deduct 80 from 140 and we're left with 60.
Grab the next digit (5) from the dividend, add it to 60, then carry on: 605 / 80

Moving on to step 6:
If we divide 605 by 80, we get 7 and a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 9117.0
The remainder is 45 after subtracting 560 from 605.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 7:
The number 80 fits into 450 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 9117.5
Subtracting 400 from 450 leaves us 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.

Let's proceed to step 8:
When dividing 500 by 80, we get 6 with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 9117.56
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.

Let's proceed to step 9:
200 divided by 80 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 9117.562
Deduct 160 from 200 and we're left 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.

Going ahead to step 10:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 9117.5625
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 9117.5625
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.

On to step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9117.5625
Subtract 0 from 0 to 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 9117.5625 with a balance of 0.0.