We're dividing 80408957 by 878 
Our goal is to divide 80408957 by 878.

Advancing to step 1:
If we divide 8 by 878, we get 0 and 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.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 878

Moving on to step 2:
878 goes into 80 0 times with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Bring next digit (4) of the dividend behind the 80 and repeat the process: 804 / 878

Let's proceed to step 3:
If we divide 804 by 878, we get 0 and a remainder of 804.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 804 and we're left with 804.
Take the next digit (0) from the dividend and append it to 804, then repeat: 8040 / 878

Moving on to step 4:
The number 878 fits into 8040 9 times, leaving a remainder of 138.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 7902 from 8040 leaves us with 138.
Bring next digit (8) of the dividend behind the 138 and repeat the process: 1388 / 878

Moving on to step 5:
878 goes into 1388 1 times with a remainder of 510.
Write down 1 as next digit of the result. 
Result so far: 91.0
Subtracting 878 from 1388 leaves us with 510.
Bring next digit (9) of the dividend behind the 510 and repeat the process: 5109 / 878

On to step 6:
If we divide 5109 by 878, we get 5 and a remainder of 719.
The number 5 becomes the next digit in our result. 
Result so far: 915.0
Deduct 4390 from 5109 and we're left with 719.
Append the next digit (5) from the dividend to 719 and continue with: 7195 / 878

Advancing to step 7:
7195 divided by 878 is 8 with a remainder of 171.
Use 8 as the next digit of our solution. 
Result so far: 9158.0
If we take 7024 away from 7195, we end up with 171.
Take the next digit (7) from the dividend and append it to 171, then repeat: 1717 / 878

Advancing to step 8:
When dividing 1717 by 878, we get 1 with a remainder of 839.
Write down 1 as next digit of the result. 
Result so far: 91581.0
If we take 878 away from 1717, we end up with 839.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8390, and continue the process.

Moving on to step 9:
When dividing 8390 by 878, we get 9 with a remainder of 488.
Use 9 as the next digit of our solution. 
Result so far: 91581.9
Deduct 7902 from 8390 and we're left with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Going ahead to step 10:
878 goes into 4880 5 times with a remainder of 490.
The next digit of our result is 5. 
Result so far: 91581.95
Subtracting 4390 from 4880 leaves us with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Going ahead to step 11:
If we divide 4900 by 878, we get 5 and a remainder of 510.
Put 5 as the next digit of the answer. 
Result so far: 91581.955
If we subtract 4390 from 4900, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

The quotient of the division is 91581.955, and the remainder is 0.051.