6489 ÷ 90 
We're looking to find how many times 90 goes into 6489.

Let's proceed to step 1:
6 divided by 90 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 90

Let's proceed to step 2:
90 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Grab the next digit (8) from the dividend, add it to 64, then carry on: 648 / 90

Let's proceed to step 3:
90 can be fit into 648 7 times, resulting in a remainder of 18.
The next digit of our result is 7. 
Result so far: 7.0
If we take 630 away from 648, we end up with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 90

Advancing to step 4:
90 goes into 189 2 times with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
Subtracting 180 from 189 leaves us with 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 5:
The number 90 fits into 90 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 72.1
Deduct 90 from 90 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 6:
If we divide 0 by 90, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 72.1
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
90 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 72.1
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 72.1 with a remaining 0.0.