638722 ÷ 30 
We're looking to find how many times 30 goes into 638722.

Moving on to step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 30

On to step 2:
63 divided by 30 is 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 3 after subtracting 60 from 63.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 30

Advancing to step 3:
38 divided by 30 is 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtract 30 from 38 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 30

Let's proceed to step 4:
If we divide 87 by 30, we get 2 and a remainder of 27.
Record the quotient 2 as the next digit in the result. 
Result so far: 212.0
The remainder is 27 after subtracting 60 from 87.
Bring next digit (2) of the dividend behind the 27 and repeat the process: 272 / 30

Step 5:
When dividing 272 by 30, we get 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 2129.0
The remainder is 2 after subtracting 270 from 272.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 30

Moving on to step 6:
The number 30 fits into 22 0 times, leaving a remainder of 22.
The next digit of our result is 0. 
Result so far: 21290.0
Subtract 0 from 22 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
30 goes into 220 7 times with a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 21290.7
Subtracting 210 from 220 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 30, we get 3 and a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 21290.73
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
If we divide 100 by 30, we get 3 and a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 21290.733
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 21290.733 with a remainder of 0.001.