51539673 ÷ 300 
We want to divide 51539673 by 300.

Step 1:
5 divided by 300 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 300

Let's proceed to step 2:
If we divide 51 by 300, we get 0 and a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 300

On to step 3:
The number 300 fits into 515 1 times, leaving a remainder of 215.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 215 after subtracting 300 from 515.
Grab the next digit (3) from the dividend, add it to 215, then carry on: 2153 / 300

Moving on to step 4:
300 goes into 2153 7 times with a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 17.0
Deduct 2100 from 2153 and we're left with 53.
Fetch the next digit (9) from the dividend, attach it to 53 and continue: 539 / 300

Going ahead to step 5:
When dividing 539 by 300, we get 1 with a remainder of 239.
Put 1 as the next digit of the answer. 
Result so far: 171.0
Deduct 300 from 539 and we're left with 239.
Include the next digit (6) from the dividend after 239, then repeat: 2396 / 300

Moving on to step 6:
300 goes into 2396 7 times with a remainder of 296.
The number 7 becomes the next digit in our result. 
Result so far: 1717.0
The remainder is 296 after subtracting 2100 from 2396.
Take the next digit (7) from the dividend and append it to 296, then repeat: 2967 / 300

Moving on to step 7:
The number 300 fits into 2967 9 times, leaving a remainder of 267.
The next digit of our result is 9. 
Result so far: 17179.0
Deduct 2700 from 2967 and we're left with 267.
Take the next digit (3) from the dividend and append it to 267, then repeat: 2673 / 300

Going ahead to step 8:
300 goes into 2673 8 times with a remainder of 273.
Record the quotient 8 as the next digit in the result. 
Result so far: 171798.0
If we subtract 2400 from 2673, we get 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Let's proceed to step 9:
The number 300 fits into 2730 9 times, leaving a remainder of 30.
The next digit of our result is 9. 
Result so far: 171798.9
If we subtract 2700 from 2730, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
300 can be fit into 300 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 171798.91
Subtracting 300 from 300 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
300 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 171798.91
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
When dividing 0 by 300, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 171798.91
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 171798.91 with a balance of 0.0.