903343 ÷ 3 
Let's see how many times 3 fits into 903343.

Step 1:
3 goes into 9 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 9 from 9 to get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 3

On to step 2:
If we divide 0 by 3, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Deduct 0 from 0 and we're left with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 3

Advancing to step 3:
3 goes into 3 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 301.0
If we subtract 3 from 3, we get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 3

Step 4:
When dividing 3 by 3, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 3011.0
The remainder is 0 after subtracting 3 from 3.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 3

On to step 5:
4 divided by 3 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 30111.0
If we subtract 3 from 4, we get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 3

Moving on to step 6:
The number 3 fits into 13 4 times, leaving a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 301114.0
Subtracting 12 from 13 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
The number 3 fits into 10 3 times, leaving a remainder of 1.
The next digit of our result is 3. 
Result so far: 301114.3
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 8:
10 divided by 3 is 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 301114.33
Subtracting 9 from 10 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 301114.33 with a remainder of 0.001.