We're dividing 768400 by 90 
We're looking to find how many times 90 goes into 768400.

On to step 1:
7 divided by 90 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 90

On to step 2:
When dividing 76 by 90, we get 0 with a remainder of 76.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 76, we get 76.
Include the next digit (8) from the dividend after 76, then repeat: 768 / 90

Going ahead to step 3:
768 divided by 90 is 8 with a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 720 away from 768, we end up with 48.
Append the next digit (4) from the dividend to 48 and continue with: 484 / 90

Moving on to step 4:
If we divide 484 by 90, we get 5 and a remainder of 34.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
If we take 450 away from 484, we end up with 34.
Append the next digit (0) from the dividend to 34 and continue with: 340 / 90

On to step 5:
The number 90 fits into 340 3 times, leaving a remainder of 70.
The number 3 becomes the next digit in our result. 
Result so far: 853.0
Subtracting 270 from 340 leaves us with 70.
Fetch the next digit (0) from the dividend, attach it to 70 and continue: 700 / 90

Step 6:
90 can be fit into 700 7 times, resulting in a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 8537.0
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
90 goes into 700 7 times with a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 8537.7
The remainder is 70 after subtracting 630 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
If we divide 700 by 90, we get 7 and a remainder of 70.
The next digit of our result is 7. 
Result so far: 8537.77
The remainder is 70 after subtracting 630 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 8537.77, and the remainder is 0.07.