78377208 ÷ 991 
We want to divide 78377208 by 991.

Step 1:
991 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 991

Let's proceed to step 2:
991 can be fit into 78 0 times, resulting in a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Include the next digit (3) from the dividend after 78, then repeat: 783 / 991

Moving on to step 3:
991 goes into 783 0 times with a remainder of 783.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 783 after subtracting 0 from 783.
Bring next digit (7) of the dividend behind the 783 and repeat the process: 7837 / 991

Advancing to step 4:
991 goes into 7837 7 times with a remainder of 900.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 900 after subtracting 6937 from 7837.
Append the next digit (7) from the dividend to 900 and continue with: 9007 / 991

Let's proceed to step 5:
The number 991 fits into 9007 9 times, leaving a remainder of 88.
The next digit of our result is 9. 
Result so far: 79.0
If we take 8919 away from 9007, we end up with 88.
Fetch the next digit (2) from the dividend, attach it to 88 and continue: 882 / 991

On to step 6:
If we divide 882 by 991, we get 0 and a remainder of 882.
Record the quotient 0 as the next digit in the result. 
Result so far: 790.0
Subtract 0 from 882 to get 882.
Bring next digit (0) of the dividend behind the 882 and repeat the process: 8820 / 991

Going ahead to step 7:
991 can be fit into 8820 8 times, resulting in a remainder of 892.
Record the quotient 8 as the next digit in the result. 
Result so far: 7908.0
Subtract 7928 from 8820 to get 892.
Include the next digit (8) from the dividend after 892, then repeat: 8928 / 991

Advancing to step 8:
If we divide 8928 by 991, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 79089.0
Subtract 8919 from 8928 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
If we divide 90 by 991, we get 0 and a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 79089.0
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 10:
If we divide 900 by 991, we get 0 and a remainder of 900.
Record the quotient 0 as the next digit in the result. 
Result so far: 79089.0
Subtracting 0 from 900 leaves us with 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9000, and continue the process.

The final outcome is 79089.0, with a leftover of 0.9.