We divide 8720591 by 678
We want to divide 8720591 by 678.

Step 1:
678 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 678

Moving on to step 2:
When dividing 87 by 678, we get 0 with a remainder of 87.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 87, we get 87.
Fetch the next digit (2) from the dividend, attach it to 87 and continue: 872 / 678

Step 3:
When dividing 872 by 678, we get 1 with a remainder of 194.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 678 from 872 to get 194.
Fetch the next digit (0) from the dividend, attach it to 194 and continue: 1940 / 678

Advancing to step 4:
The number 678 fits into 1940 2 times, leaving a remainder of 584.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 1356 from 1940, we get 584.
Include the next digit (5) from the dividend after 584, then repeat: 5845 / 678

Let's proceed to step 5:
When dividing 5845 by 678, we get 8 with a remainder of 421.
Use 8 as the next digit of our solution. 
Result so far: 128.0
Deduct 5424 from 5845 and we're left with 421.
Include the next digit (9) from the dividend after 421, then repeat: 4219 / 678

Going ahead to step 6:
The number 678 fits into 4219 6 times, leaving a remainder of 151.
Use 6 as the next digit of our solution. 
Result so far: 1286.0
Subtracting 4068 from 4219 leaves us with 151.
Append the next digit (1) from the dividend to 151 and continue with: 1511 / 678

Going ahead to step 7:
When dividing 1511 by 678, we get 2 with a remainder of 155.
The number 2 becomes the next digit in our result. 
Result so far: 12862.0
If we subtract 1356 from 1511, we get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 8:
678 can be fit into 1550 2 times, resulting in a remainder of 194.
Use 2 as the next digit of our solution. 
Result so far: 12862.2
If we subtract 1356 from 1550, we get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Let's proceed to step 9:
678 can be fit into 1940 2 times, resulting in a remainder of 584.
The number 2 becomes the next digit in our result. 
Result so far: 12862.22
Subtract 1356 from 1940 to get 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

The final outcome is 12862.22, with a leftover of 0.584.