We look at the division of 869503 by 78 
We want to divide 869503 by 78.

On to step 1:
If we divide 8 by 78, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 78

Going ahead to step 2:
78 goes into 86 1 times with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 78 from 86, we get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 78

Moving on to step 3:
89 divided by 78 is 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtracting 78 from 89 leaves us with 11.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 78

Going ahead to step 4:
78 can be fit into 115 1 times, resulting in a remainder of 37.
Use 1 as the next digit of our solution. 
Result so far: 111.0
Subtract 78 from 115 to get 37.
Grab the next digit (0) from the dividend, add it to 37, then carry on: 370 / 78

Let's proceed to step 5:
78 goes into 370 4 times with a remainder of 58.
Write down 4 as next digit of the result. 
Result so far: 1114.0
If we take 312 away from 370, we end up with 58.
Take the next digit (3) from the dividend and append it to 58, then repeat: 583 / 78

Moving on to step 6:
The number 78 fits into 583 7 times, leaving a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 11147.0
Deduct 546 from 583 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 7:
The number 78 fits into 370 4 times, leaving a remainder of 58.
Use 4 as the next digit of our solution. 
Result so far: 11147.4
Subtract 312 from 370 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 8:
78 goes into 580 7 times with a remainder of 34.
The next digit of our result is 7. 
Result so far: 11147.47
Subtract 546 from 580 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 9:
The number 78 fits into 340 4 times, leaving a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 11147.474
Subtract 312 from 340 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 10:
280 divided by 78 is 3 with a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 11147.4743
Subtracting 234 from 280 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
78 goes into 460 5 times with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 11147.47435
If we subtract 390 from 460, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 12:
The number 78 fits into 700 8 times, leaving a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 11147.474358
The remainder is 76 after subtracting 624 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 13:
78 goes into 760 9 times with a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 11147.4743589
Subtracting 702 from 760 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 14:
If we divide 580 by 78, we get 7 and a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 11147.47435897
Subtracting 546 from 580 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

The final result is 11147.47435897 with a remainder of 3.4e-08.