We look at the division of 345285 by 90 
We want to divide 345285 by 90.

Step 1:
90 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 90

Going ahead to step 2:
If we divide 34 by 90, we get 0 and a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 34 leaves us with 34.
Take the next digit (5) from the dividend and append it to 34, then repeat: 345 / 90

Step 3:
When dividing 345 by 90, we get 3 with a remainder of 75.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 75 after subtracting 270 from 345.
Grab the next digit (2) from the dividend, add it to 75, then carry on: 752 / 90

Step 4:
If we divide 752 by 90, we get 8 and a remainder of 32.
The next digit of our result is 8. 
Result so far: 38.0
Deduct 720 from 752 and we're left with 32.
Fetch the next digit (8) from the dividend, attach it to 32 and continue: 328 / 90

Moving on to step 5:
90 goes into 328 3 times with a remainder of 58.
Put 3 as the next digit of the answer. 
Result so far: 383.0
Subtract 270 from 328 to get 58.
Grab the next digit (5) from the dividend, add it to 58, then carry on: 585 / 90

Step 6:
The number 90 fits into 585 6 times, leaving a remainder of 45.
Put 6 as the next digit of the answer. 
Result so far: 3836.0
Deduct 540 from 585 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 7:
90 can be fit into 450 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 3836.5
The remainder is 0 after subtracting 450 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
90 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3836.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
When dividing 0 by 90, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3836.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 3836.5, and the remainder is 0.0.