Let's divide 840815 by 30
Let's see how many times 30 fits into 840815.

Step 1:
When dividing 8 by 30, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 30

Advancing to step 2:
The number 30 fits into 84 2 times, leaving a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 60 from 84, we get 24.
Bring next digit (0) of the dividend behind the 24 and repeat the process: 240 / 30

Going ahead to step 3:
240 divided by 30 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtracting 240 from 240 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 30

Moving on to step 4:
30 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 280.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 30

Step 5:
81 divided by 30 is 2 with a remainder of 21.
Use 2 as the next digit of our solution. 
Result so far: 2802.0
Subtract 60 from 81 to get 21.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 30

Step 6:
If we divide 215 by 30, we get 7 and a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 28027.0
If we take 210 away from 215, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
If we divide 50 by 30, we get 1 and a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 28027.1
If we take 30 away from 50, 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.

Step 8:
200 divided by 30 is 6 with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 28027.16
Deduct 180 from 200 and we're left 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.

Step 9:
30 can be fit into 200 6 times, resulting in a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 28027.166
If we subtract 180 from 200, we 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.

After the division, we end up with 28027.166 and a remainder of 0.002.