We look at the division of 186519 by 78 
Let's see how many times 78 fits into 186519.

Step 1:
If we divide 1 by 78, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 78

Going ahead to step 2:
18 divided by 78 is 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 78

Step 3:
186 divided by 78 is 2 with a remainder of 30.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 156 from 186 to get 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 78

On to step 4:
78 can be fit into 305 3 times, resulting in a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Subtracting 234 from 305 leaves us with 71.
Grab the next digit (1) from the dividend, add it to 71, then carry on: 711 / 78

Moving on to step 5:
The number 78 fits into 711 9 times, leaving a remainder of 9.
The next digit of our result is 9. 
Result so far: 239.0
The remainder is 9 after subtracting 702 from 711.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 78

Moving on to step 6:
When dividing 99 by 78, we get 1 with a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 2391.0
Deduct 78 from 99 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 7:
When dividing 210 by 78, we get 2 with a remainder of 54.
The number 2 becomes the next digit in our result. 
Result so far: 2391.2
Deduct 156 from 210 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 8:
78 goes into 540 6 times with a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 2391.26
Subtract 468 from 540 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
78 goes into 720 9 times with a remainder of 18.
The next digit of our result is 9. 
Result so far: 2391.269
Subtract 702 from 720 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
78 goes into 180 2 times with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 2391.2692
Subtracting 156 from 180 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 11:
The number 78 fits into 240 3 times, leaving a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 2391.26923
Subtracting 234 from 240 leaves us 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.

Going ahead to step 12:
60 divided by 78 is 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 2391.26923
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 13:
600 divided by 78 is 7 with a remainder of 54.
The next digit of our result is 7. 
Result so far: 2391.2692307
Deduct 546 from 600 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 14:
If we divide 540 by 78, we get 6 and a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 2391.26923076
If we subtract 468 from 540, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final result is 2391.26923076 with a remainder of 7.2e-08.