We look at the division of 39805 by 90 
We want to divide 39805 by 90.

Step 1:
When dividing 3 by 90, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 90

On to step 2:
39 divided by 90 is 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Fetch the next digit (8) from the dividend, attach it to 39 and continue: 398 / 90

Going ahead to step 3:
When dividing 398 by 90, we get 4 with a remainder of 38.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 360 from 398 and we're left with 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 90

Let's proceed to step 4:
If we divide 380 by 90, we get 4 and a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 44.0
Subtracting 360 from 380 leaves us with 20.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 90

On to step 5:
When dividing 205 by 90, we get 2 with a remainder of 25.
Use 2 as the next digit of our solution. 
Result so far: 442.0
Subtract 180 from 205 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 6:
When dividing 250 by 90, we get 2 with a remainder of 70.
Put 2 as the next digit of the answer. 
Result so far: 442.2
Subtract 180 from 250 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.

Moving on to step 7:
The number 90 fits into 700 7 times, leaving a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 442.27
Subtracting 630 from 700 leaves us 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.

Let's proceed to step 8:
If we divide 700 by 90, we get 7 and a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 442.277
If we take 630 away from 700, 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.

After the division, we end up with 442.277 and a remainder of 0.007.