16388600 divided by 648 
Our goal is to divide 16388600 by 648.

Let's proceed to step 1:
When dividing 1 by 648, we get 0 with 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.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 648

Moving on to step 2:
648 goes into 16 0 times with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 648

Going ahead to step 3:
163 divided by 648 is 0 with a remainder of 163.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 163 leaves us with 163.
Append the next digit (8) from the dividend to 163 and continue with: 1638 / 648

Going ahead to step 4:
648 goes into 1638 2 times with a remainder of 342.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1296 from 1638 leaves us with 342.
Fetch the next digit (8) from the dividend, attach it to 342 and continue: 3428 / 648

On to step 5:
The number 648 fits into 3428 5 times, leaving a remainder of 188.
Put 5 as the next digit of the answer. 
Result so far: 25.0
The remainder is 188 after subtracting 3240 from 3428.
Grab the next digit (6) from the dividend, add it to 188, then carry on: 1886 / 648

Moving on to step 6:
648 can be fit into 1886 2 times, resulting in a remainder of 590.
The next digit of our result is 2. 
Result so far: 252.0
Deduct 1296 from 1886 and we're left with 590.
Bring next digit (0) of the dividend behind the 590 and repeat the process: 5900 / 648

Going ahead to step 7:
5900 divided by 648 is 9 with a remainder of 68.
The number 9 becomes the next digit in our result. 
Result so far: 2529.0
If we take 5832 away from 5900, we end up with 68.
Append the next digit (0) from the dividend to 68 and continue with: 680 / 648

Going ahead to step 8:
The number 648 fits into 680 1 times, leaving a remainder of 32.
Put 1 as the next digit of the answer. 
Result so far: 25291.0
If we subtract 648 from 680, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 9:
When dividing 320 by 648, we get 0 with a remainder of 320.
The number 0 becomes the next digit in our result. 
Result so far: 25291.0
If we take 0 away from 320, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 10:
648 can be fit into 3200 4 times, resulting in a remainder of 608.
Use 4 as the next digit of our solution. 
Result so far: 25291.04
If we subtract 2592 from 3200, we get 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

On to step 11:
The number 648 fits into 6080 9 times, leaving a remainder of 248.
The number 9 becomes the next digit in our result. 
Result so far: 25291.049
Subtract 5832 from 6080 to get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

On to step 12:
648 goes into 2480 3 times with a remainder of 536.
Write down 3 as next digit of the result. 
Result so far: 25291.0493
If we take 1944 away from 2480, we end up with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Step 13:
If we divide 5360 by 648, we get 8 and a remainder of 176.
Use 8 as the next digit of our solution. 
Result so far: 25291.04938
If we take 5184 away from 5360, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 14:
1760 divided by 648 is 2 with a remainder of 464.
Put 2 as the next digit of the answer. 
Result so far: 25291.049382
Subtracting 1296 from 1760 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Advancing to step 15:
When dividing 4640 by 648, we get 7 with a remainder of 104.
Record the quotient 7 as the next digit in the result. 
Result so far: 25291.0493827
Deduct 4536 from 4640 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 16:
648 can be fit into 1040 1 times, resulting in a remainder of 392.
Use 1 as the next digit of our solution. 
Result so far: 25291.04938271
If we subtract 648 from 1040, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

The final outcome is 25291.04938271, with a leftover of 3.92e-07.