638494 divided by 30 
We want to figure out the number of times 638494 can be divided by 30.

On to step 1:
If we divide 6 by 30, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 30

Going ahead to step 2:
If we divide 63 by 30, we get 2 and a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 60 from 63 and we're left with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 30

Moving on to step 3:
The number 30 fits into 38 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Subtracting 30 from 38 leaves us with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 30

On to step 4:
If we divide 84 by 30, we get 2 and a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 212.0
The remainder is 24 after subtracting 60 from 84.
Include the next digit (9) from the dividend after 24, then repeat: 249 / 30

Let's proceed to step 5:
When dividing 249 by 30, we get 8 with a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 2128.0
If we take 240 away from 249, we end up with 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 30

On to step 6:
30 can be fit into 94 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 21283.0
If we take 90 away from 94, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
40 divided by 30 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 21283.1
Subtracting 30 from 40 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.

Step 8:
100 divided by 30 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 21283.13
Deduct 90 from 100 and we're left 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.

On to step 9:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 21283.133
If we subtract 90 from 100, we 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.

Our division results in 21283.133 with a remaining 0.001.