We divide 645358 by 30
We want to divide 645358 by 30.

On to step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 30

Going ahead to step 2:
30 can be fit into 64 2 times, resulting in a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 60 away from 64, we end up with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 30

On to step 3:
If we divide 45 by 30, we get 1 and a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtract 30 from 45 to get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 30

Step 4:
The number 30 fits into 153 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 215.0
Subtract 150 from 153 to get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 30

Advancing to step 5:
30 can be fit into 35 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 2151.0
If we take 30 away from 35, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 30

Let's proceed to step 6:
When dividing 58 by 30, we get 1 with a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 21511.0
If we take 30 away from 58, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 7:
If we divide 280 by 30, we get 9 and a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 21511.9
Subtracting 270 from 280 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.

Advancing to step 8:
30 goes into 100 3 times with a remainder of 10.
The next digit of our result is 3. 
Result so far: 21511.93
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.

Advancing to step 9:
When dividing 100 by 30, we get 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 21511.933
Subtracting 90 from 100 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.

Our division results in 21511.933 with a remaining 0.001.