We look at the division of 343835 by 90 
Let's see how many times 90 fits into 343835.

Let's proceed to step 1:
90 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 90

On to step 2:
34 divided by 90 is 0 with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 34 leaves us with 34.
Append the next digit (3) from the dividend to 34 and continue with: 343 / 90

Moving on to step 3:
90 can be fit into 343 3 times, resulting in a remainder of 73.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 73 after subtracting 270 from 343.
Take the next digit (8) from the dividend and append it to 73, then repeat: 738 / 90

On to step 4:
90 can be fit into 738 8 times, resulting in a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 38.0
Subtract 720 from 738 to get 18.
Fetch the next digit (3) from the dividend, attach it to 18 and continue: 183 / 90

Moving on to step 5:
90 can be fit into 183 2 times, resulting in a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 382.0
Deduct 180 from 183 and we're left with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 90

Step 6:
35 divided by 90 is 0 with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 3820.0
If we take 0 away from 35, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
When dividing 350 by 90, we get 3 with a remainder of 80.
The next digit of our result is 3. 
Result so far: 3820.3
If we take 270 away from 350, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 8:
The number 90 fits into 800 8 times, leaving a remainder of 80.
The next digit of our result is 8. 
Result so far: 3820.38
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 9:
If we divide 800 by 90, we get 8 and a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 3820.388
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 3820.388 with a remainder of 0.008.