645244 divided by 30 
The aim is to understand the frequency of 30 in 645244.

Moving on to step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 30

Going ahead to step 2:
64 divided by 30 is 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 60 from 64 to get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 30

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
Subtracting 30 from 45 leaves us with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 30

Let's proceed to step 4:
30 goes into 152 5 times with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 215.0
Subtracting 150 from 152 leaves us with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 30

Let's proceed to step 5:
The number 30 fits into 24 0 times, leaving a remainder of 24.
Put 0 as the next digit of the answer. 
Result so far: 2150.0
The remainder is 24 after subtracting 0 from 24.
Include the next digit (4) from the dividend after 24, then repeat: 244 / 30

Let's proceed to step 6:
30 can be fit into 244 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 21508.0
If we take 240 away from 244, 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.

Advancing to step 7:
30 goes into 40 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 21508.1
If we take 30 away from 40, we end up 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:
30 goes into 100 3 times with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 21508.13
If we take 90 away from 100, we end up 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 9:
When dividing 100 by 30, we get 3 with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 21508.133
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.

After the division, we end up with 21508.133 and a remainder of 0.001.