We're dividing 486447 by 3 
We're looking to find how many times 3 goes into 486447.

Step 1:
3 can be fit into 4 1 times, resulting in a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 3 away from 4, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 3

On to step 2:
If we divide 18 by 3, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Deduct 18 from 18 and we're left with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 3

Advancing to step 3:
When dividing 6 by 3, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 162.0
Deduct 6 from 6 and we're left with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 3

Step 4:
3 can be fit into 4 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1621.0
The remainder is 1 after subtracting 3 from 4.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 3

Going ahead to step 5:
If we divide 14 by 3, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 16214.0
Subtract 12 from 14 to get 2.
Take the next digit (7) from the dividend and append it to 2, then repeat: 27 / 3

Step 6:
27 divided by 3 is 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 162149.0
Subtracting 27 from 27 leaves us 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.

Going ahead to step 7:
3 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 162149.0
Deduct 0 from 0 and we're left 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.

Advancing to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 162149.0
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.

After the division, we end up with 162149.0 and a remainder of 0.0.