We look at the division of 72101403 by 644 
Our goal is to divide 72101403 by 644.

Advancing to step 1:
644 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 644

Going ahead to step 2:
The number 644 fits into 72 0 times, leaving a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 72, we end up with 72.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 644

Advancing to step 3:
The number 644 fits into 721 1 times, leaving a remainder of 77.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 77 after subtracting 644 from 721.
Include the next digit (0) from the dividend after 77, then repeat: 770 / 644

Step 4:
644 goes into 770 1 times with a remainder of 126.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 644 from 770 and we're left with 126.
Fetch the next digit (1) from the dividend, attach it to 126 and continue: 1261 / 644

Step 5:
644 goes into 1261 1 times with a remainder of 617.
The number 1 becomes the next digit in our result. 
Result so far: 111.0
Deduct 644 from 1261 and we're left with 617.
Take the next digit (4) from the dividend and append it to 617, then repeat: 6174 / 644

On to step 6:
The number 644 fits into 6174 9 times, leaving a remainder of 378.
The next digit of our result is 9. 
Result so far: 1119.0
Deduct 5796 from 6174 and we're left with 378.
Grab the next digit (0) from the dividend, add it to 378, then carry on: 3780 / 644

On to step 7:
644 goes into 3780 5 times with a remainder of 560.
Put 5 as the next digit of the answer. 
Result so far: 11195.0
If we subtract 3220 from 3780, we get 560.
Append the next digit (3) from the dividend to 560 and continue with: 5603 / 644

Going ahead to step 8:
5603 divided by 644 is 8 with a remainder of 451.
Write down 8 as next digit of the result. 
Result so far: 111958.0
If we subtract 5152 from 5603, we get 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Going ahead to step 9:
If we divide 4510 by 644, we get 7 and a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 111958.7
Subtracting 4508 from 4510 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 10:
644 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 111958.7
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 11:
200 divided by 644 is 0 with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 111958.7
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 111958.7 with a remaining 0.02.