We divide 664198 by 90
We want to figure out the number of times 664198 can be divided by 90.

Moving on to step 1:
90 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 90

Advancing to step 2:
66 divided by 90 is 0 with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Take the next digit (4) from the dividend and append it to 66, then repeat: 664 / 90

Step 3:
90 goes into 664 7 times with a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 630 from 664 leaves us with 34.
Take the next digit (1) from the dividend and append it to 34, then repeat: 341 / 90

Advancing to step 4:
When dividing 341 by 90, we get 3 with a remainder of 71.
Use 3 as the next digit of our solution. 
Result so far: 73.0
Subtracting 270 from 341 leaves us with 71.
Grab the next digit (9) from the dividend, add it to 71, then carry on: 719 / 90

On to step 5:
If we divide 719 by 90, we get 7 and a remainder of 89.
Put 7 as the next digit of the answer. 
Result so far: 737.0
The remainder is 89 after subtracting 630 from 719.
Grab the next digit (8) from the dividend, add it to 89, then carry on: 898 / 90

Advancing to step 6:
When dividing 898 by 90, we get 9 with a remainder of 88.
The next digit of our result is 9. 
Result so far: 7379.0
If we take 810 away from 898, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 7:
90 goes into 880 9 times with a remainder of 70.
The number 9 becomes the next digit in our result. 
Result so far: 7379.9
If we take 810 away from 880, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
The number 90 fits into 700 7 times, leaving a remainder of 70.
The next digit of our result is 7. 
Result so far: 7379.97
The remainder is 70 after subtracting 630 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 9:
90 goes into 700 7 times with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 7379.977
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 7379.977, and the remainder is 0.007.