We look at the division of 80680115 by 644 
Let's see how many times 644 fits into 80680115.

Advancing to step 1:
The number 644 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 644

Advancing to step 2:
The number 644 fits into 80 0 times, leaving a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Include the next digit (6) from the dividend after 80, then repeat: 806 / 644

Step 3:
The number 644 fits into 806 1 times, leaving a remainder of 162.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 644 from 806 and we're left with 162.
Include the next digit (8) from the dividend after 162, then repeat: 1628 / 644

Let's proceed to step 4:
When dividing 1628 by 644, we get 2 with a remainder of 340.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1288 away from 1628, we end up with 340.
Include the next digit (0) from the dividend after 340, then repeat: 3400 / 644

Advancing to step 5:
When dividing 3400 by 644, we get 5 with a remainder of 180.
The next digit of our result is 5. 
Result so far: 125.0
Subtract 3220 from 3400 to get 180.
Take the next digit (1) from the dividend and append it to 180, then repeat: 1801 / 644

Moving on to step 6:
644 goes into 1801 2 times with a remainder of 513.
Put 2 as the next digit of the answer. 
Result so far: 1252.0
If we subtract 1288 from 1801, we get 513.
Grab the next digit (1) from the dividend, add it to 513, then carry on: 5131 / 644

Let's proceed to step 7:
644 can be fit into 5131 7 times, resulting in a remainder of 623.
Record the quotient 7 as the next digit in the result. 
Result so far: 12527.0
If we take 4508 away from 5131, we end up with 623.
Grab the next digit (5) from the dividend, add it to 623, then carry on: 6235 / 644

Advancing to step 8:
644 goes into 6235 9 times with a remainder of 439.
Use 9 as the next digit of our solution. 
Result so far: 125279.0
If we subtract 5796 from 6235, 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.

On to step 9:
The number 644 fits into 4390 6 times, leaving a remainder of 526.
Put 6 as the next digit of the answer. 
Result so far: 125279.6
Deduct 3864 from 4390 and we're left with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Moving on to step 10:
644 can be fit into 5260 8 times, resulting in a remainder of 108.
The number 8 becomes the next digit in our result. 
Result so far: 125279.68
If we take 5152 away from 5260, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 11:
The number 644 fits into 1080 1 times, leaving a remainder of 436.
Record the quotient 1 as the next digit in the result. 
Result so far: 125279.681
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.

Step 12:
4360 divided by 644 is 6 with a remainder of 496.
Record the quotient 6 as the next digit in the result. 
Result so far: 125279.6816
The remainder is 496 after subtracting 3864 from 4360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Advancing to step 13:
644 goes into 4960 7 times with a remainder of 452.
Put 7 as the next digit of the answer. 
Result so far: 125279.68167
Subtracting 4508 from 4960 leaves us with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Moving on to step 14:
If we divide 4520 by 644, we get 7 and a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 125279.681677
The remainder is 12 after subtracting 4508 from 4520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 125279.681677 and a remainder of 1.2e-06.