661884 ÷ 90 
Let's see how many times 90 fits into 661884.

Let's proceed to step 1:
When dividing 6 by 90, we get 0 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

On to step 2:
90 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Bring next digit (1) of the dividend behind the 66 and repeat the process: 661 / 90

On to step 3:
661 divided by 90 is 7 with a remainder of 31.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 31 after subtracting 630 from 661.
Grab the next digit (8) from the dividend, add it to 31, then carry on: 318 / 90

Let's proceed to step 4:
When dividing 318 by 90, we get 3 with a remainder of 48.
Use 3 as the next digit of our solution. 
Result so far: 73.0
Subtract 270 from 318 to get 48.
Bring next digit (8) of the dividend behind the 48 and repeat the process: 488 / 90

Let's proceed to step 5:
90 can be fit into 488 5 times, resulting in a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 735.0
Deduct 450 from 488 and we're left with 38.
Bring next digit (4) of the dividend behind the 38 and repeat the process: 384 / 90

Step 6:
384 divided by 90 is 4 with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 7354.0
The remainder is 24 after subtracting 360 from 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
90 can be fit into 240 2 times, resulting in a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 7354.2
The remainder is 60 after subtracting 180 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
90 goes into 600 6 times with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 7354.26
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
90 goes into 600 6 times with a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 7354.266
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 7354.266 and a remainder of 0.006.