We look at the division of 78973515 by 15 
Our goal is to divide 78973515 by 15.

Going ahead to step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 15

On to step 2:
The number 15 fits into 78 5 times, leaving a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 75 from 78 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 15

Let's proceed to step 3:
If we divide 39 by 15, we get 2 and a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 52.0
Subtracting 30 from 39 leaves us with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 15

Let's proceed to step 4:
When dividing 97 by 15, we get 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 526.0
If we take 90 away from 97, we end up with 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 15

Moving on to step 5:
15 can be fit into 73 4 times, resulting in a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 5264.0
Subtract 60 from 73 to get 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 15

On to step 6:
The number 15 fits into 135 9 times, leaving a remainder of 0.
The next digit of our result is 9. 
Result so far: 52649.0
Subtract 135 from 135 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 15

Step 7:
1 divided by 15 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 526490.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 15

Advancing to step 8:
The number 15 fits into 15 1 times, leaving a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 5264901.0
The remainder is 0 after subtracting 15 from 15.
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 9:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5264901.0
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.

Advancing to step 10:
If we divide 0 by 15, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5264901.0
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.

In conclusion, the division gives 5264901.0 with a balance of 0.0.