38920128 divided by 648 
We want to figure out the number of times 38920128 can be divided by 648.

Advancing to step 1:
If we divide 3 by 648, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 648

Going ahead to step 2:
38 divided by 648 is 0 with a remainder of 38.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 38 and we're left with 38.
Include the next digit (9) from the dividend after 38, then repeat: 389 / 648

On to step 3:
648 can be fit into 389 0 times, resulting in a remainder of 389.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 389 to get 389.
Take the next digit (2) from the dividend and append it to 389, then repeat: 3892 / 648

Let's proceed to step 4:
The number 648 fits into 3892 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 3888 from 3892 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 648

On to step 5:
40 divided by 648 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 60.0
Subtract 0 from 40 to get 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 648

Step 6:
When dividing 401 by 648, we get 0 with a remainder of 401.
The next digit of our result is 0. 
Result so far: 600.0
The remainder is 401 after subtracting 0 from 401.
Append the next digit (2) from the dividend to 401 and continue with: 4012 / 648

Going ahead to step 7:
When dividing 4012 by 648, we get 6 with a remainder of 124.
Put 6 as the next digit of the answer. 
Result so far: 6006.0
The remainder is 124 after subtracting 3888 from 4012.
Bring next digit (8) of the dividend behind the 124 and repeat the process: 1248 / 648

Advancing to step 8:
If we divide 1248 by 648, we get 1 and a remainder of 600.
Use 1 as the next digit of our solution. 
Result so far: 60061.0
If we take 648 away from 1248, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Going ahead to step 9:
The number 648 fits into 6000 9 times, leaving a remainder of 168.
Put 9 as the next digit of the answer. 
Result so far: 60061.9
The remainder is 168 after subtracting 5832 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 10:
648 goes into 1680 2 times with a remainder of 384.
Use 2 as the next digit of our solution. 
Result so far: 60061.92
Subtracting 1296 from 1680 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 11:
When dividing 3840 by 648, we get 5 with a remainder of 600.
Use 5 as the next digit of our solution. 
Result so far: 60061.925
Subtracting 3240 from 3840 leaves us with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Let's proceed to step 12:
When dividing 6000 by 648, we get 9 with a remainder of 168.
The next digit of our result is 9. 
Result so far: 60061.9259
The remainder is 168 after subtracting 5832 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Moving on to step 13:
If we divide 1680 by 648, we get 2 and a remainder of 384.
The next digit of our result is 2. 
Result so far: 60061.92592
Subtract 1296 from 1680 to get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Moving on to step 14:
The number 648 fits into 3840 5 times, leaving a remainder of 600.
The next digit of our result is 5. 
Result so far: 60061.925925
The remainder is 600 after subtracting 3240 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 15:
648 goes into 6000 9 times with a remainder of 168.
Use 9 as the next digit of our solution. 
Result so far: 60061.9259259
Deduct 5832 from 6000 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 16:
1680 divided by 648 is 2 with a remainder of 384.
Use 2 as the next digit of our solution. 
Result so far: 60061.92592592
If we take 1296 away from 1680, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

The final result is 60061.92592592 with a remainder of 3.84e-07.