438531 ÷ 30 
We want to figure out the number of times 438531 can be divided by 30.

On to step 1:
When dividing 4 by 30, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 30

On to step 2:
When dividing 43 by 30, we get 1 with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 30 away from 43, we end up with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 30

Going ahead to step 3:
When dividing 138 by 30, we get 4 with a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Subtract 120 from 138 to get 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 30

Moving on to step 4:
If we divide 185 by 30, we get 6 and a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 146.0
If we subtract 180 from 185, we get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 30

Step 5:
When dividing 53 by 30, we get 1 with a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 1461.0
Deduct 30 from 53 and we're left with 23.
Take the next digit (1) from the dividend and append it to 23, then repeat: 231 / 30

Going ahead to step 6:
When dividing 231 by 30, we get 7 with a remainder of 21.
Use 7 as the next digit of our solution. 
Result so far: 14617.0
Deduct 210 from 231 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
30 goes into 210 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 14617.7
If we subtract 210 from 210, we get 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 8:
When dividing 0 by 30, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 14617.7
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 9:
30 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 14617.7
Subtracting 0 from 0 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.

The final outcome is 14617.7, with a leftover of 0.0.