Let's divide 77979776 by 90
We want to figure out the number of times 77979776 can be divided by 90.

Going ahead to step 1:
90 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 90

Step 2:
If we divide 77 by 90, we get 0 and a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Fetch the next digit (9) from the dividend, attach it to 77 and continue: 779 / 90

Step 3:
90 goes into 779 8 times with a remainder of 59.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 59 after subtracting 720 from 779.
Bring next digit (7) of the dividend behind the 59 and repeat the process: 597 / 90

Moving on to step 4:
The number 90 fits into 597 6 times, leaving a remainder of 57.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
Subtracting 540 from 597 leaves us with 57.
Bring next digit (9) of the dividend behind the 57 and repeat the process: 579 / 90

On to step 5:
The number 90 fits into 579 6 times, leaving a remainder of 39.
Put 6 as the next digit of the answer. 
Result so far: 866.0
Deduct 540 from 579 and we're left with 39.
Take the next digit (7) from the dividend and append it to 39, then repeat: 397 / 90

Advancing to step 6:
If we divide 397 by 90, we get 4 and a remainder of 37.
The number 4 becomes the next digit in our result. 
Result so far: 8664.0
If we take 360 away from 397, we end up with 37.
Fetch the next digit (7) from the dividend, attach it to 37 and continue: 377 / 90

Step 7:
If we divide 377 by 90, we get 4 and a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 86644.0
Subtract 360 from 377 to get 17.
Append the next digit (6) from the dividend to 17 and continue with: 176 / 90

Let's proceed to step 8:
The number 90 fits into 176 1 times, leaving a remainder of 86.
Record the quotient 1 as the next digit in the result. 
Result so far: 866441.0
If we subtract 90 from 176, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Going ahead to step 9:
The number 90 fits into 860 9 times, leaving a remainder of 50.
The number 9 becomes the next digit in our result. 
Result so far: 866441.9
Subtract 810 from 860 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 10:
If we divide 500 by 90, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 866441.95
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 11:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 866441.955
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 866441.955 with a remaining 0.005.