Let's divide 661191 by 90
We're looking to find how many times 90 goes into 661191.

Moving on to step 1:
When dividing 6 by 90, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 90

Step 2:
If we divide 66 by 90, we get 0 and a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 90

Going ahead to step 3:
661 divided by 90 is 7 with a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 630 from 661, we get 31.
Take the next digit (1) from the dividend and append it to 31, then repeat: 311 / 90

Advancing to step 4:
If we divide 311 by 90, we get 3 and a remainder of 41.
The number 3 becomes the next digit in our result. 
Result so far: 73.0
Subtract 270 from 311 to get 41.
Include the next digit (9) from the dividend after 41, then repeat: 419 / 90

Step 5:
90 can be fit into 419 4 times, resulting in a remainder of 59.
Write down 4 as next digit of the result. 
Result so far: 734.0
The remainder is 59 after subtracting 360 from 419.
Grab the next digit (1) from the dividend, add it to 59, then carry on: 591 / 90

Going ahead to step 6:
The number 90 fits into 591 6 times, leaving a remainder of 51.
Put 6 as the next digit of the answer. 
Result so far: 7346.0
Subtracting 540 from 591 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 7:
If we divide 510 by 90, we get 5 and a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 7346.5
If we subtract 450 from 510, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 7346.56
If we subtract 540 from 600, we get 60.
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 9:
90 can be fit into 600 6 times, resulting in a remainder of 60.
The next digit of our result is 6. 
Result so far: 7346.566
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 7346.566 with a balance of 0.006.