Let's divide 72718735 by 509
Our goal is to divide 72718735 by 509.

Going ahead to step 1:
7 divided by 509 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 509

Advancing to step 2:
509 can be fit into 72 0 times, resulting in a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 72, we get 72.
Fetch the next digit (7) from the dividend, attach it to 72 and continue: 727 / 509

Advancing to step 3:
If we divide 727 by 509, we get 1 and a remainder of 218.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 509 away from 727, we end up with 218.
Append the next digit (1) from the dividend to 218 and continue with: 2181 / 509

Step 4:
509 goes into 2181 4 times with a remainder of 145.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtracting 2036 from 2181 leaves us with 145.
Fetch the next digit (8) from the dividend, attach it to 145 and continue: 1458 / 509

Moving on to step 5:
509 goes into 1458 2 times with a remainder of 440.
The number 2 becomes the next digit in our result. 
Result so far: 142.0
The remainder is 440 after subtracting 1018 from 1458.
Fetch the next digit (7) from the dividend, attach it to 440 and continue: 4407 / 509

Moving on to step 6:
509 can be fit into 4407 8 times, resulting in a remainder of 335.
Record the quotient 8 as the next digit in the result. 
Result so far: 1428.0
Deduct 4072 from 4407 and we're left with 335.
Take the next digit (3) from the dividend and append it to 335, then repeat: 3353 / 509

Going ahead to step 7:
3353 divided by 509 is 6 with a remainder of 299.
The next digit of our result is 6. 
Result so far: 14286.0
Subtracting 3054 from 3353 leaves us with 299.
Include the next digit (5) from the dividend after 299, then repeat: 2995 / 509

Step 8:
509 can be fit into 2995 5 times, resulting in a remainder of 450.
Put 5 as the next digit of the answer. 
Result so far: 142865.0
If we subtract 2545 from 2995, we get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Moving on to step 9:
When dividing 4500 by 509, we get 8 with a remainder of 428.
Write down 8 as next digit of the result. 
Result so far: 142865.8
Subtracting 4072 from 4500 leaves us with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Advancing to step 10:
If we divide 4280 by 509, we get 8 and a remainder of 208.
Record the quotient 8 as the next digit in the result. 
Result so far: 142865.88
Subtracting 4072 from 4280 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

The final outcome is 142865.88, with a leftover of 0.208.