53648094 ÷ 644 
We want to figure out the number of times 53648094 can be divided by 644.

Let's proceed to step 1:
5 divided by 644 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 644

Moving on to step 2:
The number 644 fits into 53 0 times, leaving a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Bring next digit (6) of the dividend behind the 53 and repeat the process: 536 / 644

Let's proceed to step 3:
644 can be fit into 536 0 times, resulting in a remainder of 536.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 536 after subtracting 0 from 536.
Fetch the next digit (4) from the dividend, attach it to 536 and continue: 5364 / 644

Step 4:
If we divide 5364 by 644, we get 8 and a remainder of 212.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 212 after subtracting 5152 from 5364.
Fetch the next digit (8) from the dividend, attach it to 212 and continue: 2128 / 644

On to step 5:
644 can be fit into 2128 3 times, resulting in a remainder of 196.
Write down 3 as next digit of the result. 
Result so far: 83.0
Subtract 1932 from 2128 to get 196.
Append the next digit (0) from the dividend to 196 and continue with: 1960 / 644

Advancing to step 6:
If we divide 1960 by 644, we get 3 and a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 833.0
If we take 1932 away from 1960, we end up with 28.
Include the next digit (9) from the dividend after 28, then repeat: 289 / 644

Going ahead to step 7:
The number 644 fits into 289 0 times, leaving a remainder of 289.
Record the quotient 0 as the next digit in the result. 
Result so far: 8330.0
The remainder is 289 after subtracting 0 from 289.
Take the next digit (4) from the dividend and append it to 289, then repeat: 2894 / 644

Let's proceed to step 8:
644 can be fit into 2894 4 times, resulting in a remainder of 318.
The next digit of our result is 4. 
Result so far: 83304.0
Subtract 2576 from 2894 to get 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

On to step 9:
3180 divided by 644 is 4 with a remainder of 604.
Use 4 as the next digit of our solution. 
Result so far: 83304.4
If we subtract 2576 from 3180, we get 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

On to step 10:
If we divide 6040 by 644, we get 9 and a remainder of 244.
Record the quotient 9 as the next digit in the result. 
Result so far: 83304.49
Deduct 5796 from 6040 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 11:
When dividing 2440 by 644, we get 3 with a remainder of 508.
Record the quotient 3 as the next digit in the result. 
Result so far: 83304.493
If we subtract 1932 from 2440, we get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Let's proceed to step 12:
5080 divided by 644 is 7 with a remainder of 572.
The number 7 becomes the next digit in our result. 
Result so far: 83304.4937
Subtract 4508 from 5080 to get 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Moving on to step 13:
644 goes into 5720 8 times with a remainder of 568.
Use 8 as the next digit of our solution. 
Result so far: 83304.49378
Deduct 5152 from 5720 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

On to step 14:
The number 644 fits into 5680 8 times, leaving a remainder of 528.
The number 8 becomes the next digit in our result. 
Result so far: 83304.493788
The remainder is 528 after subtracting 5152 from 5680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

After the division, we end up with 83304.493788 and a remainder of 5.28e-05.