Let's divide 21840278 by 425
We want to figure out the number of times 21840278 can be divided by 425.

Going ahead to step 1:
The number 425 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 425

Moving on to step 2:
When dividing 21 by 425, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 425

Moving on to step 3:
425 goes into 218 0 times with a remainder of 218.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 218 and we're left with 218.
Include the next digit (4) from the dividend after 218, then repeat: 2184 / 425

On to step 4:
If we divide 2184 by 425, we get 5 and a remainder of 59.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 2125 from 2184, we get 59.
Grab the next digit (0) from the dividend, add it to 59, then carry on: 590 / 425

On to step 5:
The number 425 fits into 590 1 times, leaving a remainder of 165.
Use 1 as the next digit of our solution. 
Result so far: 51.0
Deduct 425 from 590 and we're left with 165.
Include the next digit (2) from the dividend after 165, then repeat: 1652 / 425

Moving on to step 6:
1652 divided by 425 is 3 with a remainder of 377.
The number 3 becomes the next digit in our result. 
Result so far: 513.0
If we subtract 1275 from 1652, we get 377.
Include the next digit (7) from the dividend after 377, then repeat: 3777 / 425

On to step 7:
The number 425 fits into 3777 8 times, leaving a remainder of 377.
Put 8 as the next digit of the answer. 
Result so far: 5138.0
If we take 3400 away from 3777, we end up with 377.
Include the next digit (8) from the dividend after 377, then repeat: 3778 / 425

Step 8:
The number 425 fits into 3778 8 times, leaving a remainder of 378.
Record the quotient 8 as the next digit in the result. 
Result so far: 51388.0
Subtract 3400 from 3778 to get 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Moving on to step 9:
425 can be fit into 3780 8 times, resulting in a remainder of 380.
Put 8 as the next digit of the answer. 
Result so far: 51388.8
Subtracting 3400 from 3780 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Advancing to step 10:
The number 425 fits into 3800 8 times, leaving a remainder of 400.
Write down 8 as next digit of the result. 
Result so far: 51388.88
Subtracting 3400 from 3800 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

After the division, we end up with 51388.88 and a remainder of 0.4.