53564750 ÷ 648 
We want to figure out the number of times 53564750 can be divided by 648.

On to step 1:
648 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 648

Moving on to step 2:
The number 648 fits into 53 0 times, leaving a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Append the next digit (5) from the dividend to 53 and continue with: 535 / 648

Let's proceed to step 3:
535 divided by 648 is 0 with a remainder of 535.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 535 and we're left with 535.
Include the next digit (6) from the dividend after 535, then repeat: 5356 / 648

Going ahead to step 4:
When dividing 5356 by 648, we get 8 with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 5184 from 5356 to get 172.
Grab the next digit (4) from the dividend, add it to 172, then carry on: 1724 / 648

Step 5:
The number 648 fits into 1724 2 times, leaving a remainder of 428.
Put 2 as the next digit of the answer. 
Result so far: 82.0
If we take 1296 away from 1724, we end up with 428.
Bring next digit (7) of the dividend behind the 428 and repeat the process: 4287 / 648

Going ahead to step 6:
648 can be fit into 4287 6 times, resulting in a remainder of 399.
The number 6 becomes the next digit in our result. 
Result so far: 826.0
Deduct 3888 from 4287 and we're left with 399.
Include the next digit (5) from the dividend after 399, then repeat: 3995 / 648

Going ahead to step 7:
The number 648 fits into 3995 6 times, leaving a remainder of 107.
The next digit of our result is 6. 
Result so far: 8266.0
Subtract 3888 from 3995 to get 107.
Fetch the next digit (0) from the dividend, attach it to 107 and continue: 1070 / 648

On to step 8:
1070 divided by 648 is 1 with a remainder of 422.
Record the quotient 1 as the next digit in the result. 
Result so far: 82661.0
If we take 648 away from 1070, we end up with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Moving on to step 9:
4220 divided by 648 is 6 with a remainder of 332.
Use 6 as the next digit of our solution. 
Result so far: 82661.6
Subtract 3888 from 4220 to get 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

On to step 10:
When dividing 3320 by 648, we get 5 with a remainder of 80.
The number 5 becomes the next digit in our result. 
Result so far: 82661.65
If we subtract 3240 from 3320, we get 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 11:
The number 648 fits into 800 1 times, leaving a remainder of 152.
Write down 1 as next digit of the result. 
Result so far: 82661.651
Subtracting 648 from 800 leaves us 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.

Step 12:
When dividing 1520 by 648, we get 2 with a remainder of 224.
Record the quotient 2 as the next digit in the result. 
Result so far: 82661.6512
Subtracting 1296 from 1520 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Going ahead to step 13:
When dividing 2240 by 648, we get 3 with a remainder of 296.
The number 3 becomes the next digit in our result. 
Result so far: 82661.65123
If we subtract 1944 from 2240, we get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

On to step 14:
When dividing 2960 by 648, we get 4 with a remainder of 368.
Put 4 as the next digit of the answer. 
Result so far: 82661.651234
Deduct 2592 from 2960 and we're left with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Moving on to step 15:
If we divide 3680 by 648, we get 5 and a remainder of 440.
Record the quotient 5 as the next digit in the result. 
Result so far: 82661.6512345
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.

Advancing to step 16:
4400 divided by 648 is 6 with a remainder of 512.
The next digit of our result is 6. 
Result so far: 82661.65123456
If we subtract 3888 from 4400, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

The final result is 82661.65123456 with a remainder of 5.12e-07.