We're dividing 99428858 by 648 
We want to figure out the number of times 99428858 can be divided by 648.

Let's proceed to step 1:
648 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 648

Moving on to step 2:
99 divided by 648 is 0 with a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 99 to get 99.
Append the next digit (4) from the dividend to 99 and continue with: 994 / 648

Moving on to step 3:
If we divide 994 by 648, we get 1 and a remainder of 346.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 346 after subtracting 648 from 994.
Include the next digit (2) from the dividend after 346, then repeat: 3462 / 648

On to step 4:
When dividing 3462 by 648, we get 5 with a remainder of 222.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Deduct 3240 from 3462 and we're left with 222.
Fetch the next digit (8) from the dividend, attach it to 222 and continue: 2228 / 648

Moving on to step 5:
648 goes into 2228 3 times with a remainder of 284.
Put 3 as the next digit of the answer. 
Result so far: 153.0
If we subtract 1944 from 2228, we get 284.
Include the next digit (8) from the dividend after 284, then repeat: 2848 / 648

Advancing to step 6:
The number 648 fits into 2848 4 times, leaving a remainder of 256.
Record the quotient 4 as the next digit in the result. 
Result so far: 1534.0
Deduct 2592 from 2848 and we're left with 256.
Grab the next digit (5) from the dividend, add it to 256, then carry on: 2565 / 648

Advancing to step 7:
When dividing 2565 by 648, we get 3 with a remainder of 621.
Record the quotient 3 as the next digit in the result. 
Result so far: 15343.0
If we take 1944 away from 2565, we end up with 621.
Grab the next digit (8) from the dividend, add it to 621, then carry on: 6218 / 648

Moving on to step 8:
648 goes into 6218 9 times with a remainder of 386.
Write down 9 as next digit of the result. 
Result so far: 153439.0
Subtracting 5832 from 6218 leaves us with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Moving on to step 9:
648 can be fit into 3860 5 times, resulting in a remainder of 620.
The number 5 becomes the next digit in our result. 
Result so far: 153439.5
Subtracting 3240 from 3860 leaves us with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

On to step 10:
648 goes into 6200 9 times with a remainder of 368.
Record the quotient 9 as the next digit in the result. 
Result so far: 153439.59
If we subtract 5832 from 6200, we get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

On to step 11:
648 goes into 3680 5 times with a remainder of 440.
The number 5 becomes the next digit in our result. 
Result so far: 153439.595
Subtract 3240 from 3680 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 12:
When dividing 4400 by 648, we get 6 with a remainder of 512.
Write down 6 as next digit of the result. 
Result so far: 153439.5956
Deduct 3888 from 4400 and we're left with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Going ahead to step 13:
When dividing 5120 by 648, we get 7 with a remainder of 584.
Put 7 as the next digit of the answer. 
Result so far: 153439.59567
The remainder is 584 after subtracting 4536 from 5120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Moving on to step 14:
648 goes into 5840 9 times with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 153439.595679
The remainder is 8 after subtracting 5832 from 5840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 15:
648 goes into 80 0 times with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 153439.595679
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 16:
648 can be fit into 800 1 times, resulting in a remainder of 152.
The number 1 becomes the next digit in our result. 
Result so far: 153439.59567901
Deduct 648 from 800 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

The final result is 153439.59567901 with a remainder of 1.52e-07.