We look at the division of 75398797 by 878 
We're looking to find how many times 878 goes into 75398797.

Moving on to step 1:
When dividing 7 by 878, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 878

On to step 2:
878 goes into 75 0 times with a remainder of 75.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 75 to get 75.
Take the next digit (3) from the dividend and append it to 75, then repeat: 753 / 878

Advancing to step 3:
When dividing 753 by 878, we get 0 with a remainder of 753.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 753 to get 753.
Append the next digit (9) from the dividend to 753 and continue with: 7539 / 878

Advancing to step 4:
7539 divided by 878 is 8 with a remainder of 515.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 7024 from 7539 and we're left with 515.
Include the next digit (8) from the dividend after 515, then repeat: 5158 / 878

Let's proceed to step 5:
The number 878 fits into 5158 5 times, leaving a remainder of 768.
Write down 5 as next digit of the result. 
Result so far: 85.0
The remainder is 768 after subtracting 4390 from 5158.
Append the next digit (7) from the dividend to 768 and continue with: 7687 / 878

On to step 6:
7687 divided by 878 is 8 with a remainder of 663.
The next digit of our result is 8. 
Result so far: 858.0
Subtracting 7024 from 7687 leaves us with 663.
Bring next digit (9) of the dividend behind the 663 and repeat the process: 6639 / 878

Moving on to step 7:
When dividing 6639 by 878, we get 7 with a remainder of 493.
The number 7 becomes the next digit in our result. 
Result so far: 8587.0
The remainder is 493 after subtracting 6146 from 6639.
Take the next digit (7) from the dividend and append it to 493, then repeat: 4937 / 878

Going ahead to step 8:
878 goes into 4937 5 times with a remainder of 547.
Write down 5 as next digit of the result. 
Result so far: 85875.0
Subtract 4390 from 4937 to get 547.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

Advancing to step 9:
5470 divided by 878 is 6 with a remainder of 202.
Put 6 as the next digit of the answer. 
Result so far: 85875.6
If we take 5268 away from 5470, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Step 10:
878 can be fit into 2020 2 times, resulting in a remainder of 264.
The number 2 becomes the next digit in our result. 
Result so far: 85875.62
Deduct 1756 from 2020 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 11:
If we divide 2640 by 878, we get 3 and a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 85875.623
The remainder is 6 after subtracting 2634 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
60 divided by 878 is 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 85875.623
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.

Step 13:
The number 878 fits into 600 0 times, leaving a remainder of 600.
Write down 0 as next digit of the result. 
Result so far: 85875.623
Subtract 0 from 600 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

After the division, we end up with 85875.623 and a remainder of 0.0006.