We look at the division of 615186 by 78 
We want to divide 615186 by 78.

Advancing to step 1:
6 divided by 78 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 78

Let's proceed to step 2:
If we divide 61 by 78, we get 0 and a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 61 and we're left with 61.
Grab the next digit (5) from the dividend, add it to 61, then carry on: 615 / 78

On to step 3:
78 can be fit into 615 7 times, resulting in a remainder of 69.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 546 away from 615, we end up with 69.
Take the next digit (1) from the dividend and append it to 69, then repeat: 691 / 78

Going ahead to step 4:
78 can be fit into 691 8 times, resulting in a remainder of 67.
Write down 8 as next digit of the result. 
Result so far: 78.0
Deduct 624 from 691 and we're left with 67.
Include the next digit (8) from the dividend after 67, then repeat: 678 / 78

On to step 5:
78 can be fit into 678 8 times, resulting in a remainder of 54.
The number 8 becomes the next digit in our result. 
Result so far: 788.0
If we subtract 624 from 678, we get 54.
Take the next digit (6) from the dividend and append it to 54, then repeat: 546 / 78

Step 6:
546 divided by 78 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 7887.0
Deduct 546 from 546 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.

On to step 7:
If we divide 0 by 78, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7887.0
The remainder is 0 after subtracting 0 from 0.
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 8:
78 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7887.0
The remainder is 0 after subtracting 0 from 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 7887.0, with a leftover of 0.0.