We're dividing 280488 by 90 
We're looking to find how many times 90 goes into 280488.

On to step 1:
90 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 90

Advancing to step 2:
When dividing 28 by 90, we get 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 28 to get 28.
Fetch the next digit (0) from the dividend, attach it to 28 and continue: 280 / 90

On to step 3:
The number 90 fits into 280 3 times, leaving a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 270 from 280 and we're left with 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 90

Advancing to step 4:
90 goes into 104 1 times with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
If we subtract 90 from 104, we get 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 90

Moving on to step 5:
90 can be fit into 148 1 times, resulting in a remainder of 58.
The number 1 becomes the next digit in our result. 
Result so far: 311.0
Subtracting 90 from 148 leaves us with 58.
Append the next digit (8) from the dividend to 58 and continue with: 588 / 90

Advancing to step 6:
When dividing 588 by 90, we get 6 with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 3116.0
Subtracting 540 from 588 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 7:
90 can be fit into 480 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 3116.5
Subtracting 450 from 480 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 3116.53
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
90 goes into 300 3 times with a remainder of 30.
The next digit of our result is 3. 
Result so far: 3116.533
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The quotient of the division is 3116.533, and the remainder is 0.003.