81480350 divided by 644 
We want to figure out the number of times 81480350 can be divided by 644.

Advancing to step 1:
644 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 644

Moving on to step 2:
644 can be fit into 81 0 times, resulting in a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Bring next digit (4) of the dividend behind the 81 and repeat the process: 814 / 644

Let's proceed to step 3:
The number 644 fits into 814 1 times, leaving a remainder of 170.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 644 from 814, we get 170.
Append the next digit (8) from the dividend to 170 and continue with: 1708 / 644

Step 4:
644 can be fit into 1708 2 times, resulting in a remainder of 420.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Deduct 1288 from 1708 and we're left with 420.
Bring next digit (0) of the dividend behind the 420 and repeat the process: 4200 / 644

Going ahead to step 5:
If we divide 4200 by 644, we get 6 and a remainder of 336.
The next digit of our result is 6. 
Result so far: 126.0
Subtract 3864 from 4200 to get 336.
Bring next digit (3) of the dividend behind the 336 and repeat the process: 3363 / 644

Going ahead to step 6:
3363 divided by 644 is 5 with a remainder of 143.
The next digit of our result is 5. 
Result so far: 1265.0
If we take 3220 away from 3363, we end up with 143.
Fetch the next digit (5) from the dividend, attach it to 143 and continue: 1435 / 644

Going ahead to step 7:
644 can be fit into 1435 2 times, resulting in a remainder of 147.
Record the quotient 2 as the next digit in the result. 
Result so far: 12652.0
Subtracting 1288 from 1435 leaves us with 147.
Append the next digit (0) from the dividend to 147 and continue with: 1470 / 644

Going ahead to step 8:
644 can be fit into 1470 2 times, resulting in a remainder of 182.
Use 2 as the next digit of our solution. 
Result so far: 126522.0
If we subtract 1288 from 1470, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Step 9:
If we divide 1820 by 644, we get 2 and a remainder of 532.
Put 2 as the next digit of the answer. 
Result so far: 126522.2
If we subtract 1288 from 1820, we get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

On to step 10:
The number 644 fits into 5320 8 times, leaving a remainder of 168.
Record the quotient 8 as the next digit in the result. 
Result so far: 126522.28
Subtracting 5152 from 5320 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

On to step 11:
If we divide 1680 by 644, we get 2 and a remainder of 392.
The number 2 becomes the next digit in our result. 
Result so far: 126522.282
Deduct 1288 from 1680 and we're left with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Moving on to step 12:
644 can be fit into 3920 6 times, resulting in a remainder of 56.
The next digit of our result is 6. 
Result so far: 126522.2826
Subtract 3864 from 3920 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 13:
When dividing 560 by 644, we get 0 with a remainder of 560.
The number 0 becomes the next digit in our result. 
Result so far: 126522.2826
If we take 0 away from 560, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 14:
The number 644 fits into 5600 8 times, leaving a remainder of 448.
Write down 8 as next digit of the result. 
Result so far: 126522.282608
The remainder is 448 after subtracting 5152 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Moving on to step 15:
4480 divided by 644 is 6 with a remainder of 616.
The next digit of our result is 6. 
Result so far: 126522.2826086
The remainder is 616 after subtracting 3864 from 4480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Step 16:
644 can be fit into 6160 9 times, resulting in a remainder of 364.
The number 9 becomes the next digit in our result. 
Result so far: 126522.28260869
If we subtract 5796 from 6160, we get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Our division results in 126522.28260869 with a remaining 3.64e-07.