We're dividing 16149889 by 648 
Our goal is to divide 16149889 by 648.

Going ahead to step 1:
The number 648 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 648

Advancing to step 2:
The number 648 fits into 16 0 times, leaving a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 648

Let's proceed to step 3:
648 goes into 161 0 times with a remainder of 161.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 161 and we're left with 161.
Fetch the next digit (4) from the dividend, attach it to 161 and continue: 1614 / 648

Going ahead to step 4:
1614 divided by 648 is 2 with a remainder of 318.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 1296 from 1614 leaves us with 318.
Fetch the next digit (9) from the dividend, attach it to 318 and continue: 3189 / 648

On to step 5:
The number 648 fits into 3189 4 times, leaving a remainder of 597.
The next digit of our result is 4. 
Result so far: 24.0
Subtract 2592 from 3189 to get 597.
Grab the next digit (8) from the dividend, add it to 597, then carry on: 5978 / 648

Going ahead to step 6:
If we divide 5978 by 648, we get 9 and a remainder of 146.
Put 9 as the next digit of the answer. 
Result so far: 249.0
Deduct 5832 from 5978 and we're left with 146.
Fetch the next digit (8) from the dividend, attach it to 146 and continue: 1468 / 648

Advancing to step 7:
1468 divided by 648 is 2 with a remainder of 172.
Use 2 as the next digit of our solution. 
Result so far: 2492.0
The remainder is 172 after subtracting 1296 from 1468.
Include the next digit (9) from the dividend after 172, then repeat: 1729 / 648

On to step 8:
1729 divided by 648 is 2 with a remainder of 433.
Use 2 as the next digit of our solution. 
Result so far: 24922.0
The remainder is 433 after subtracting 1296 from 1729.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Advancing to step 9:
When dividing 4330 by 648, we get 6 with a remainder of 442.
Record the quotient 6 as the next digit in the result. 
Result so far: 24922.6
The remainder is 442 after subtracting 3888 from 4330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Going ahead to step 10:
If we divide 4420 by 648, we get 6 and a remainder of 532.
The next digit of our result is 6. 
Result so far: 24922.66
The remainder is 532 after subtracting 3888 from 4420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

After the division, we end up with 24922.66 and a remainder of 0.532.