We look at the division of 99378597 by 888 
We want to divide 99378597 by 888.

Going ahead to step 1:
When dividing 9 by 888, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 888

Moving on to step 2:
888 can be fit into 99 0 times, resulting in a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Append the next digit (3) from the dividend to 99 and continue with: 993 / 888

Let's proceed to step 3:
993 divided by 888 is 1 with a remainder of 105.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 888 from 993, we get 105.
Include the next digit (7) from the dividend after 105, then repeat: 1057 / 888

Going ahead to step 4:
888 can be fit into 1057 1 times, resulting in a remainder of 169.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 888 from 1057 to get 169.
Include the next digit (8) from the dividend after 169, then repeat: 1698 / 888

On to step 5:
888 can be fit into 1698 1 times, resulting in a remainder of 810.
Write down 1 as next digit of the result. 
Result so far: 111.0
Subtracting 888 from 1698 leaves us with 810.
Grab the next digit (5) from the dividend, add it to 810, then carry on: 8105 / 888

Let's proceed to step 6:
The number 888 fits into 8105 9 times, leaving a remainder of 113.
Put 9 as the next digit of the answer. 
Result so far: 1119.0
Deduct 7992 from 8105 and we're left with 113.
Append the next digit (9) from the dividend to 113 and continue with: 1139 / 888

On to step 7:
The number 888 fits into 1139 1 times, leaving a remainder of 251.
Use 1 as the next digit of our solution. 
Result so far: 11191.0
The remainder is 251 after subtracting 888 from 1139.
Append the next digit (7) from the dividend to 251 and continue with: 2517 / 888

Going ahead to step 8:
888 can be fit into 2517 2 times, resulting in a remainder of 741.
The number 2 becomes the next digit in our result. 
Result so far: 111912.0
Subtract 1776 from 2517 to get 741.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7410, and continue the process.

Moving on to step 9:
888 goes into 7410 8 times with a remainder of 306.
Write down 8 as next digit of the result. 
Result so far: 111912.8
If we subtract 7104 from 7410, we get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Let's proceed to step 10:
When dividing 3060 by 888, we get 3 with a remainder of 396.
The next digit of our result is 3. 
Result so far: 111912.83
Deduct 2664 from 3060 and we're left with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Let's proceed to step 11:
If we divide 3960 by 888, we get 4 and a remainder of 408.
The next digit of our result is 4. 
Result so far: 111912.834
Subtracting 3552 from 3960 leaves us with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Step 12:
888 goes into 4080 4 times with a remainder of 528.
Write down 4 as next digit of the result. 
Result so far: 111912.8344
The remainder is 528 after subtracting 3552 from 4080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

The final outcome is 111912.8344, with a leftover of 0.00528.