Let's divide 84566280 by 644
We want to figure out the number of times 84566280 can be divided by 644.

On to step 1:
644 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 644

On to step 2:
If we divide 84 by 644, we get 0 and a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Include the next digit (5) from the dividend after 84, then repeat: 845 / 644

Step 3:
644 goes into 845 1 times with a remainder of 201.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 644 from 845 to get 201.
Take the next digit (6) from the dividend and append it to 201, then repeat: 2016 / 644

Step 4:
If we divide 2016 by 644, we get 3 and a remainder of 84.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 1932 from 2016 leaves us with 84.
Fetch the next digit (6) from the dividend, attach it to 84 and continue: 846 / 644

Let's proceed to step 5:
846 divided by 644 is 1 with a remainder of 202.
Use 1 as the next digit of our solution. 
Result so far: 131.0
The remainder is 202 after subtracting 644 from 846.
Grab the next digit (2) from the dividend, add it to 202, then carry on: 2022 / 644

Let's proceed to step 6:
2022 divided by 644 is 3 with a remainder of 90.
The next digit of our result is 3. 
Result so far: 1313.0
Subtracting 1932 from 2022 leaves us with 90.
Append the next digit (8) from the dividend to 90 and continue with: 908 / 644

Let's proceed to step 7:
644 can be fit into 908 1 times, resulting in a remainder of 264.
The next digit of our result is 1. 
Result so far: 13131.0
If we take 644 away from 908, we end up with 264.
Bring next digit (0) of the dividend behind the 264 and repeat the process: 2640 / 644

On to step 8:
2640 divided by 644 is 4 with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 131314.0
If we subtract 2576 from 2640, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 9:
The number 644 fits into 640 0 times, leaving a remainder of 640.
Use 0 as the next digit of our solution. 
Result so far: 131314.0
The remainder is 640 after subtracting 0 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 10:
644 goes into 6400 9 times with a remainder of 604.
Use 9 as the next digit of our solution. 
Result so far: 131314.09
Subtracting 5796 from 6400 leaves us with 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Let's proceed to step 11:
The number 644 fits into 6040 9 times, leaving a remainder of 244.
Put 9 as the next digit of the answer. 
Result so far: 131314.099
Deduct 5796 from 6040 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

The quotient of the division is 131314.099, and the remainder is 0.0244.