394193 ÷ 90 
Let's see how many times 90 fits into 394193.

Step 1:
The number 90 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 90

Advancing to step 2:
If we divide 39 by 90, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (4) from the dividend, add it to 39, then carry on: 394 / 90

On to step 3:
When dividing 394 by 90, we get 4 with a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 360 from 394, we get 34.
Bring next digit (1) of the dividend behind the 34 and repeat the process: 341 / 90

Let's proceed to step 4:
If we divide 341 by 90, we get 3 and a remainder of 71.
The next digit of our result is 3. 
Result so far: 43.0
Subtracting 270 from 341 leaves us with 71.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 90

Step 5:
The number 90 fits into 719 7 times, leaving a remainder of 89.
The number 7 becomes the next digit in our result. 
Result so far: 437.0
Subtracting 630 from 719 leaves us with 89.
Take the next digit (3) from the dividend and append it to 89, then repeat: 893 / 90

Advancing to step 6:
90 can be fit into 893 9 times, resulting in a remainder of 83.
Record the quotient 9 as the next digit in the result. 
Result so far: 4379.0
Subtracting 810 from 893 leaves us with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 7:
90 goes into 830 9 times with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 4379.9
The remainder is 20 after subtracting 810 from 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
200 divided by 90 is 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 4379.92
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
When dividing 200 by 90, we get 2 with a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 4379.922
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 4379.922 with a remainder of 0.002.