778791 divided by 15 
We want to figure out the number of times 778791 can be divided by 15.

Moving on to step 1:
If we divide 7 by 15, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 15

Moving on to step 2:
15 goes into 77 5 times with a remainder of 2.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 75 from 77 to get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 15

Advancing to step 3:
15 can be fit into 28 1 times, resulting in a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 51.0
Subtracting 15 from 28 leaves us with 13.
Bring next digit (7) of the dividend behind the 13 and repeat the process: 137 / 15

Let's proceed to step 4:
137 divided by 15 is 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 519.0
Subtract 135 from 137 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 15

Moving on to step 5:
15 can be fit into 29 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 5191.0
If we subtract 15 from 29, we get 14.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 15

Step 6:
If we divide 141 by 15, we get 9 and a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 51919.0
Deduct 135 from 141 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
When dividing 60 by 15, we get 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 51919.4
Subtract 60 from 60 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.

Let's proceed to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 51919.4
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.

Let's proceed to step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 51919.4
Deduct 0 from 0 and we're left 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 result is 51919.4 with a remainder of 0.0.