Let's divide 721856 by 1
We want to figure out the number of times 721856 can be divided by 1.

Going ahead to step 1:
The number 1 fits into 7 7 times, leaving a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 7 from 7, we get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

Moving on to step 2:
1 can be fit into 2 2 times, resulting in a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
If we subtract 2 from 2, we get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

On to step 3:
When dividing 1 by 1, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 721.0
Subtract 1 from 1 to get 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 1

Advancing to step 4:
8 divided by 1 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 7218.0
Subtract 8 from 8 to get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Step 5:
1 can be fit into 5 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 72185.0
If we subtract 5 from 5, we get 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 1

Advancing to step 6:
1 can be fit into 6 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 721856.0
If we subtract 6 from 6, 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 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 721856.0
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 8:
If we divide 0 by 1, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 721856.0
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.

The final outcome is 721856.0, with a leftover of 0.0.