78864918 ÷ 855 
We want to divide 78864918 by 855.

Let's proceed to step 1:
7 divided by 855 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 855

On to step 2:
If we divide 78 by 855, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 855

Let's proceed to step 3:
788 divided by 855 is 0 with a remainder of 788.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 788, we end up with 788.
Bring next digit (6) of the dividend behind the 788 and repeat the process: 7886 / 855

Moving on to step 4:
855 can be fit into 7886 9 times, resulting in a remainder of 191.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 191 after subtracting 7695 from 7886.
Include the next digit (4) from the dividend after 191, then repeat: 1914 / 855

Step 5:
If we divide 1914 by 855, we get 2 and a remainder of 204.
Use 2 as the next digit of our solution. 
Result so far: 92.0
Subtracting 1710 from 1914 leaves us with 204.
Bring next digit (9) of the dividend behind the 204 and repeat the process: 2049 / 855

Moving on to step 6:
When dividing 2049 by 855, we get 2 with a remainder of 339.
Put 2 as the next digit of the answer. 
Result so far: 922.0
If we subtract 1710 from 2049, we get 339.
Include the next digit (1) from the dividend after 339, then repeat: 3391 / 855

Let's proceed to step 7:
855 goes into 3391 3 times with a remainder of 826.
Put 3 as the next digit of the answer. 
Result so far: 9223.0
If we subtract 2565 from 3391, we get 826.
Bring next digit (8) of the dividend behind the 826 and repeat the process: 8268 / 855

On to step 8:
855 goes into 8268 9 times with a remainder of 573.
The number 9 becomes the next digit in our result. 
Result so far: 92239.0
Deduct 7695 from 8268 and we're left with 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5730, and continue the process.

Let's proceed to step 9:
5730 divided by 855 is 6 with a remainder of 600.
Use 6 as the next digit of our solution. 
Result so far: 92239.6
Subtracting 5130 from 5730 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 10:
855 can be fit into 6000 7 times, resulting in a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 92239.67
Deduct 5985 from 6000 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
150 divided by 855 is 0 with a remainder of 150.
The next digit of our result is 0. 
Result so far: 92239.67
If we subtract 0 from 150, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 12:
1500 divided by 855 is 1 with a remainder of 645.
Record the quotient 1 as the next digit in the result. 
Result so far: 92239.6701
If we subtract 855 from 1500, we get 645.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6450, and continue the process.

On to step 13:
855 can be fit into 6450 7 times, resulting in a remainder of 465.
The number 7 becomes the next digit in our result. 
Result so far: 92239.67017
Subtract 5985 from 6450 to get 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Let's proceed to step 14:
855 can be fit into 4650 5 times, resulting in a remainder of 375.
Write down 5 as next digit of the result. 
Result so far: 92239.670175
If we take 4275 away from 4650, we end up with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

On to step 15:
855 goes into 3750 4 times with a remainder of 330.
The number 4 becomes the next digit in our result. 
Result so far: 92239.6701754
Subtract 3420 from 3750 to get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 16:
If we divide 3300 by 855, we get 3 and a remainder of 735.
Write down 3 as next digit of the result. 
Result so far: 92239.67017543
Subtract 2565 from 3300 to get 735.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7350, and continue the process.

The final outcome is 92239.67017543, with a leftover of 7.35e-07.