639446 ÷ 30 
We're looking to find how many times 30 goes into 639446.

Advancing to step 1:
If we divide 6 by 30, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 30

On to step 2:
63 divided by 30 is 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 3 after subtracting 60 from 63.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 30

On to step 3:
The number 30 fits into 39 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 21.0
The remainder is 9 after subtracting 30 from 39.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 30

Step 4:
30 can be fit into 94 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 213.0
If we take 90 away from 94, we end up with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 30

Let's proceed to step 5:
The number 30 fits into 44 1 times, leaving a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 2131.0
Subtracting 30 from 44 leaves us with 14.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 30

Moving on to step 6:
30 goes into 146 4 times with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 21314.0
Subtracting 120 from 146 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 7:
30 can be fit into 260 8 times, resulting in a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 21314.8
Subtract 240 from 260 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
When dividing 200 by 30, we get 6 with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 21314.86
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
If we divide 200 by 30, we get 6 and a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 21314.866
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 21314.866 with a remaining 0.002.