12282163 ÷ 644 
We're looking to find how many times 644 goes into 12282163.

Going ahead to step 1:
When dividing 1 by 644, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 644

Moving on to step 2:
If we divide 12 by 644, we get 0 and a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 644

Step 3:
The number 644 fits into 122 0 times, leaving a remainder of 122.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 122 leaves us with 122.
Append the next digit (8) from the dividend to 122 and continue with: 1228 / 644

Advancing to step 4:
1228 divided by 644 is 1 with a remainder of 584.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 584 after subtracting 644 from 1228.
Append the next digit (2) from the dividend to 584 and continue with: 5842 / 644

Moving on to step 5:
When dividing 5842 by 644, we get 9 with a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtract 5796 from 5842 to get 46.
Append the next digit (1) from the dividend to 46 and continue with: 461 / 644

Step 6:
The number 644 fits into 461 0 times, leaving a remainder of 461.
Put 0 as the next digit of the answer. 
Result so far: 190.0
If we take 0 away from 461, we end up with 461.
Append the next digit (6) from the dividend to 461 and continue with: 4616 / 644

Step 7:
The number 644 fits into 4616 7 times, leaving a remainder of 108.
The next digit of our result is 7. 
Result so far: 1907.0
If we subtract 4508 from 4616, we get 108.
Take the next digit (3) from the dividend and append it to 108, then repeat: 1083 / 644

On to step 8:
644 goes into 1083 1 times with a remainder of 439.
The number 1 becomes the next digit in our result. 
Result so far: 19071.0
If we subtract 644 from 1083, we get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Let's proceed to step 9:
4390 divided by 644 is 6 with a remainder of 526.
Put 6 as the next digit of the answer. 
Result so far: 19071.6
Subtract 3864 from 4390 to get 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Let's proceed to step 10:
If we divide 5260 by 644, we get 8 and a remainder of 108.
Put 8 as the next digit of the answer. 
Result so far: 19071.68
Subtract 5152 from 5260 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 11:
1080 divided by 644 is 1 with a remainder of 436.
The next digit of our result is 1. 
Result so far: 19071.681
If we subtract 644 from 1080, we get 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

On to step 12:
If we divide 4360 by 644, we get 6 and a remainder of 496.
Write down 6 as next digit of the result. 
Result so far: 19071.6816
Deduct 3864 from 4360 and we're left with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

On to step 13:
644 goes into 4960 7 times with a remainder of 452.
The next digit of our result is 7. 
Result so far: 19071.68167
Subtract 4508 from 4960 to get 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

On to step 14:
644 goes into 4520 7 times with a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 19071.681677
Deduct 4508 from 4520 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 19071.681677 with a remaining 1.2e-06.