We're dividing 421500 by 30 
Our goal is to divide 421500 by 30.

On to step 1:
30 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 30

On to step 2:
30 goes into 42 1 times with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 30 from 42 and we're left with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 30

Moving on to step 3:
When dividing 121 by 30, we get 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
The remainder is 1 after subtracting 120 from 121.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 30

Step 4:
30 goes into 15 0 times with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 140.0
The remainder is 15 after subtracting 0 from 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 30

Step 5:
When dividing 150 by 30, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1405.0
Deduct 150 from 150 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 30

Let's proceed to step 6:
The number 30 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14050.0
If we subtract 0 from 0, 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 7:
If we divide 0 by 30, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14050.0
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.

Step 8:
The number 30 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14050.0
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.

In conclusion, the division gives 14050.0 with a balance of 0.0.