721316 ÷ 80 
We want to figure out the number of times 721316 can be divided by 80.

Advancing to step 1:
80 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 80

Advancing to step 2:
When dividing 72 by 80, we get 0 with a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 80

Going ahead to step 3:
The number 80 fits into 721 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 1 after subtracting 720 from 721.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 80

Step 4:
The number 80 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 90.0
If we subtract 0 from 13, we get 13.
Append the next digit (1) from the dividend to 13 and continue with: 131 / 80

On to step 5:
80 can be fit into 131 1 times, resulting in a remainder of 51.
The number 1 becomes the next digit in our result. 
Result so far: 901.0
If we take 80 away from 131, we end up with 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 80

Advancing to step 6:
80 can be fit into 516 6 times, resulting in a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 9016.0
If we take 480 away from 516, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 7:
If we divide 360 by 80, we get 4 and a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 9016.4
The remainder is 40 after subtracting 320 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
If we divide 400 by 80, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 9016.45
Subtracting 400 from 400 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.

Let's proceed to step 9:
80 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 9016.45
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.

Moving on to step 10:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 9016.45
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.

After the division, we end up with 9016.45 and a remainder of 0.0.