We divide 354661 by 90
Our goal is to divide 354661 by 90.

Step 1:
The number 90 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 90

On to step 2:
90 can be fit into 35 0 times, resulting in a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Append the next digit (4) from the dividend to 35 and continue with: 354 / 90

Going ahead to step 3:
The number 90 fits into 354 3 times, leaving a remainder of 84.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 270 from 354 leaves us with 84.
Fetch the next digit (6) from the dividend, attach it to 84 and continue: 846 / 90

Let's proceed to step 4:
When dividing 846 by 90, we get 9 with a remainder of 36.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we subtract 810 from 846, we get 36.
Bring next digit (6) of the dividend behind the 36 and repeat the process: 366 / 90

Going ahead to step 5:
The number 90 fits into 366 4 times, leaving a remainder of 6.
The next digit of our result is 4. 
Result so far: 394.0
If we take 360 away from 366, we end up with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 90

Let's proceed to step 6:
61 divided by 90 is 0 with a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 3940.0
If we subtract 0 from 61, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

On to step 7:
The number 90 fits into 610 6 times, leaving a remainder of 70.
Record the quotient 6 as the next digit in the result. 
Result so far: 3940.6
Deduct 540 from 610 and we're left 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:
90 goes into 700 7 times with a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 3940.67
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.

Advancing to step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 3940.677
Deduct 630 from 700 and we're left 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.

The final outcome is 3940.677, with a leftover of 0.007.