858249 ÷ 78 
Our goal is to divide 858249 by 78.

Going ahead to step 1:
8 divided by 78 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 78

Step 2:
The number 78 fits into 85 1 times, leaving a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 78 from 85 to get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 78

Moving on to step 3:
78 can be fit into 78 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 78 from 78 to get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 78

Moving on to step 4:
When dividing 2 by 78, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 110.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 78

Moving on to step 5:
When dividing 24 by 78, we get 0 with a remainder of 24.
Put 0 as the next digit of the answer. 
Result so far: 1100.0
If we take 0 away from 24, we end up with 24.
Include the next digit (9) from the dividend after 24, then repeat: 249 / 78

Moving on to step 6:
If we divide 249 by 78, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 11003.0
The remainder is 15 after subtracting 234 from 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
78 goes into 150 1 times with a remainder of 72.
Use 1 as the next digit of our solution. 
Result so far: 11003.1
The remainder is 72 after subtracting 78 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 8:
If we divide 720 by 78, we get 9 and a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 11003.19
Deduct 702 from 720 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
The number 78 fits into 180 2 times, leaving a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 11003.192
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.

Advancing to step 10:
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: 11003.1923
If we take 234 away from 240, we end up 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.

Advancing to step 11:
78 can be fit into 60 0 times, resulting in a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 11003.1923
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
The number 78 fits into 600 7 times, leaving a remainder of 54.
Write down 7 as next digit of the result. 
Result so far: 11003.192307
If we subtract 546 from 600, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 13:
If we divide 540 by 78, we get 6 and a remainder of 72.
Put 6 as the next digit of the answer. 
Result so far: 11003.1923076
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.

Moving on to step 14:
If we divide 720 by 78, we get 9 and a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 11003.19230769
Subtracting 702 from 720 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 11003.19230769 and a remainder of 1.8e-08.