We look at the division of 644312 by 49 
Our goal is to divide 644312 by 49.

On to step 1:
49 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 49

Moving on to step 2:
When dividing 64 by 49, we get 1 with a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 49 from 64 and we're left with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 49

Moving on to step 3:
When dividing 154 by 49, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 147 from 154, we get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 49

Let's proceed to step 4:
The number 49 fits into 73 1 times, leaving a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 131.0
Subtracting 49 from 73 leaves us with 24.
Take the next digit (1) from the dividend and append it to 24, then repeat: 241 / 49

Step 5:
If we divide 241 by 49, we get 4 and a remainder of 45.
The next digit of our result is 4. 
Result so far: 1314.0
Deduct 196 from 241 and we're left with 45.
Fetch the next digit (2) from the dividend, attach it to 45 and continue: 452 / 49

On to step 6:
452 divided by 49 is 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 13149.0
If we subtract 441 from 452, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
110 divided by 49 is 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 13149.2
Deduct 98 from 110 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.

Step 8:
49 can be fit into 120 2 times, resulting in a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 13149.22
If we take 98 away from 120, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

After the division, we end up with 13149.22 and a remainder of 0.022.