640428 divided by 2 
The aim is to understand the frequency of 2 in 640428.

On to step 1:
2 can be fit into 6 3 times, resulting in a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 6 from 6 to get 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 2

Going ahead to step 2:
The number 2 fits into 4 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 32.0
Deduct 4 from 4 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 2

Advancing to step 3:
When dividing 0 by 2, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 320.0
The remainder is 0 after subtracting 0 from 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 2

Moving on to step 4:
The number 2 fits into 4 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 3202.0
If we take 4 away from 4, we end up with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 2

Step 5:
When dividing 2 by 2, we get 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 32021.0
If we take 2 away from 2, we end up with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 2

Step 6:
When dividing 8 by 2, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 320214.0
Deduct 8 from 8 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.

Going ahead to step 7:
0 divided by 2 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 320214.0
Subtract 0 from 0 to 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.

Advancing to step 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 320214.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 320214.0 with a remaining 0.0.