We look at the division of 90564305 by 648 
We're looking to find how many times 648 goes into 90564305.

Moving on to step 1:
The number 648 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 648

Moving on to step 2:
When dividing 90 by 648, we get 0 with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Grab the next digit (5) from the dividend, add it to 90, then carry on: 905 / 648

Going ahead to step 3:
648 goes into 905 1 times with a remainder of 257.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 648 from 905 leaves us with 257.
Grab the next digit (6) from the dividend, add it to 257, then carry on: 2576 / 648

Advancing to step 4:
When dividing 2576 by 648, we get 3 with a remainder of 632.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we take 1944 away from 2576, we end up with 632.
Grab the next digit (4) from the dividend, add it to 632, then carry on: 6324 / 648

Advancing to step 5:
When dividing 6324 by 648, we get 9 with a remainder of 492.
Use 9 as the next digit of our solution. 
Result so far: 139.0
Subtract 5832 from 6324 to get 492.
Append the next digit (3) from the dividend to 492 and continue with: 4923 / 648

Step 6:
4923 divided by 648 is 7 with a remainder of 387.
Use 7 as the next digit of our solution. 
Result so far: 1397.0
Subtracting 4536 from 4923 leaves us with 387.
Bring next digit (0) of the dividend behind the 387 and repeat the process: 3870 / 648

Step 7:
648 can be fit into 3870 5 times, resulting in a remainder of 630.
Put 5 as the next digit of the answer. 
Result so far: 13975.0
If we take 3240 away from 3870, we end up with 630.
Grab the next digit (5) from the dividend, add it to 630, then carry on: 6305 / 648

Going ahead to step 8:
The number 648 fits into 6305 9 times, leaving a remainder of 473.
The next digit of our result is 9. 
Result so far: 139759.0
Deduct 5832 from 6305 and we're left with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Let's proceed to step 9:
If we divide 4730 by 648, we get 7 and a remainder of 194.
Write down 7 as next digit of the result. 
Result so far: 139759.7
If we take 4536 away from 4730, we end up with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Going ahead to step 10:
648 can be fit into 1940 2 times, resulting in a remainder of 644.
The next digit of our result is 2. 
Result so far: 139759.72
Subtracting 1296 from 1940 leaves us with 644.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

Let's proceed to step 11:
6440 divided by 648 is 9 with a remainder of 608.
Write down 9 as next digit of the result. 
Result so far: 139759.729
Subtract 5832 from 6440 to 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 12:
648 goes into 6080 9 times with a remainder of 248.
The number 9 becomes the next digit in our result. 
Result so far: 139759.7299
Subtracting 5832 from 6080 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

After the division, we end up with 139759.7299 and a remainder of 0.00248.