66788 ÷ 90 
We want to figure out the number of times 66788 can be divided by 90.

Let's proceed to step 1:
90 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 90

Going ahead to step 2:
90 goes into 66 0 times with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Bring next digit (7) of the dividend behind the 66 and repeat the process: 667 / 90

On to step 3:
90 can be fit into 667 7 times, resulting in a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 37 after subtracting 630 from 667.
Grab the next digit (8) from the dividend, add it to 37, then carry on: 378 / 90

Step 4:
90 can be fit into 378 4 times, resulting in a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
The remainder is 18 after subtracting 360 from 378.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 90

On to step 5:
188 divided by 90 is 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 742.0
If we take 180 away from 188, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 6:
90 can be fit into 80 0 times, resulting in a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 742.0
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 7:
800 divided by 90 is 8 with a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 742.08
Deduct 720 from 800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
90 can be fit into 800 8 times, resulting in a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 742.088
If we take 720 away from 800, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final outcome is 742.088, with a leftover of 0.008.