We divide 446503 by 3
We're looking to find how many times 3 goes into 446503.

Moving on to step 1:
When dividing 4 by 3, we get 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 3 from 4, we get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 3

Moving on to step 2:
14 divided by 3 is 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Deduct 12 from 14 and we're left with 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 3

Advancing to step 3:
If we divide 26 by 3, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 148.0
Subtracting 24 from 26 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 3

Going ahead to step 4:
25 divided by 3 is 8 with a remainder of 1.
The next digit of our result is 8. 
Result so far: 1488.0
Subtract 24 from 25 to get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 3

Let's proceed to step 5:
3 can be fit into 10 3 times, resulting in a remainder of 1.
The next digit of our result is 3. 
Result so far: 14883.0
The remainder is 1 after subtracting 9 from 10.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 3

Step 6:
3 can be fit into 13 4 times, resulting in a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 148834.0
Deduct 12 from 13 and we're left 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.

Let's proceed to step 7:
If we divide 10 by 3, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 148834.3
If we subtract 9 from 10, we 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.

Step 8:
10 divided by 3 is 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 148834.33
If we take 9 away from 10, we end up 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.

After the division, we end up with 148834.33 and a remainder of 0.001.