We divide 81049549 by 644
Our goal is to divide 81049549 by 644.

Step 1:
If we divide 8 by 644, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 644

Advancing to step 2:
The number 644 fits into 81 0 times, leaving a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (0) from the dividend after 81, then repeat: 810 / 644

Let's proceed to step 3:
If we divide 810 by 644, we get 1 and a remainder of 166.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 644 from 810 and we're left with 166.
Take the next digit (4) from the dividend and append it to 166, then repeat: 1664 / 644

Moving on to step 4:
644 goes into 1664 2 times with a remainder of 376.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 1288 from 1664 leaves us with 376.
Append the next digit (9) from the dividend to 376 and continue with: 3769 / 644

Advancing to step 5:
When dividing 3769 by 644, we get 5 with a remainder of 549.
Use 5 as the next digit of our solution. 
Result so far: 125.0
Deduct 3220 from 3769 and we're left with 549.
Append the next digit (5) from the dividend to 549 and continue with: 5495 / 644

On to step 6:
When dividing 5495 by 644, we get 8 with a remainder of 343.
Write down 8 as next digit of the result. 
Result so far: 1258.0
If we take 5152 away from 5495, we end up with 343.
Take the next digit (4) from the dividend and append it to 343, then repeat: 3434 / 644

Going ahead to step 7:
If we divide 3434 by 644, we get 5 and a remainder of 214.
Put 5 as the next digit of the answer. 
Result so far: 12585.0
If we subtract 3220 from 3434, we get 214.
Grab the next digit (9) from the dividend, add it to 214, then carry on: 2149 / 644

Let's proceed to step 8:
2149 divided by 644 is 3 with a remainder of 217.
The next digit of our result is 3. 
Result so far: 125853.0
Subtract 1932 from 2149 to get 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Advancing to step 9:
2170 divided by 644 is 3 with a remainder of 238.
Put 3 as the next digit of the answer. 
Result so far: 125853.3
If we subtract 1932 from 2170, we get 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Step 10:
644 can be fit into 2380 3 times, resulting in a remainder of 448.
The number 3 becomes the next digit in our result. 
Result so far: 125853.33
Subtract 1932 from 2380 to get 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

The final outcome is 125853.33, with a leftover of 0.448.