We look at the division of 53685387 by 104 
We want to figure out the number of times 53685387 can be divided by 104.

Step 1:
If we divide 5 by 104, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 104

Moving on to step 2:
The number 104 fits into 53 0 times, leaving a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Grab the next digit (6) from the dividend, add it to 53, then carry on: 536 / 104

Advancing to step 3:
104 goes into 536 5 times with a remainder of 16.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 520 from 536 and we're left with 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 104

On to step 4:
104 goes into 168 1 times with a remainder of 64.
Put 1 as the next digit of the answer. 
Result so far: 51.0
The remainder is 64 after subtracting 104 from 168.
Include the next digit (5) from the dividend after 64, then repeat: 645 / 104

Let's proceed to step 5:
104 goes into 645 6 times with a remainder of 21.
The next digit of our result is 6. 
Result so far: 516.0
Deduct 624 from 645 and we're left with 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 104

Moving on to step 6:
213 divided by 104 is 2 with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 5162.0
If we subtract 208 from 213, we get 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 104

Advancing to step 7:
When dividing 58 by 104, we get 0 with a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 51620.0
The remainder is 58 after subtracting 0 from 58.
Grab the next digit (7) from the dividend, add it to 58, then carry on: 587 / 104

Let's proceed to step 8:
If we divide 587 by 104, we get 5 and a remainder of 67.
Write down 5 as next digit of the result. 
Result so far: 516205.0
If we subtract 520 from 587, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 9:
The number 104 fits into 670 6 times, leaving a remainder of 46.
Write down 6 as next digit of the result. 
Result so far: 516205.6
If we subtract 624 from 670, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 10:
104 goes into 460 4 times with a remainder of 44.
Record the quotient 4 as the next digit in the result. 
Result so far: 516205.64
The remainder is 44 after subtracting 416 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 11:
104 can be fit into 440 4 times, resulting in a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 516205.644
Subtract 416 from 440 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 516205.644 and a remainder of 0.0024.