We're dividing 19640 by 24 
We want to figure out the number of times 19640 can be divided by 24.

On to step 1:
24 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 24

On to step 2:
24 can be fit into 19 0 times, resulting in a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 19 to get 19.
Append the next digit (6) from the dividend to 19 and continue with: 196 / 24

Advancing to step 3:
24 can be fit into 196 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 192 from 196 leaves us with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 24

On to step 4:
When dividing 44 by 24, we get 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 81.0
Deduct 24 from 44 and we're left with 20.
Fetch the next digit (0) from the dividend, attach it to 20 and continue: 200 / 24

Going ahead to step 5:
200 divided by 24 is 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 818.0
If we subtract 192 from 200, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 6:
When dividing 80 by 24, we get 3 with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 818.3
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
The number 24 fits into 80 3 times, leaving a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 818.33
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 818.33, and the remainder is 0.008.