Let's divide 8721 by 80
We want to figure out the number of times 8721 can be divided by 80.

Let's proceed to step 1:
80 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 80

Advancing to step 2:
87 divided by 80 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 80 from 87, we get 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 80

On to step 3:
The number 80 fits into 72 0 times, leaving a remainder of 72.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 72 and we're left with 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 80

Moving on to step 4:
80 goes into 721 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 109.0
Deduct 720 from 721 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 5:
10 divided by 80 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 109.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 6:
80 can be fit into 100 1 times, resulting in a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 109.01
Deduct 80 from 100 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
80 can be fit into 200 2 times, resulting in a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 109.012
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.

Advancing to step 8:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 109.0125
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.

Advancing to step 9:
80 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 109.0125
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.

Let's proceed to step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 109.0125
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.

The final outcome is 109.0125, with a leftover of 0.0.