Let's divide 65903653 by 509
We want to divide 65903653 by 509.

Step 1:
509 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 509

Step 2:
509 can be fit into 65 0 times, resulting in a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 65 leaves us with 65.
Append the next digit (9) from the dividend to 65 and continue with: 659 / 509

Step 3:
659 divided by 509 is 1 with a remainder of 150.
The next digit of our result is 1. 
Result so far: 1.0
If we take 509 away from 659, we end up with 150.
Append the next digit (0) from the dividend to 150 and continue with: 1500 / 509

Advancing to step 4:
509 can be fit into 1500 2 times, resulting in a remainder of 482.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 1018 from 1500 leaves us with 482.
Fetch the next digit (3) from the dividend, attach it to 482 and continue: 4823 / 509

Step 5:
4823 divided by 509 is 9 with a remainder of 242.
Put 9 as the next digit of the answer. 
Result so far: 129.0
Subtract 4581 from 4823 to get 242.
Fetch the next digit (6) from the dividend, attach it to 242 and continue: 2426 / 509

Advancing to step 6:
The number 509 fits into 2426 4 times, leaving a remainder of 390.
Write down 4 as next digit of the result. 
Result so far: 1294.0
If we take 2036 away from 2426, we end up with 390.
Take the next digit (5) from the dividend and append it to 390, then repeat: 3905 / 509

On to step 7:
3905 divided by 509 is 7 with a remainder of 342.
The number 7 becomes the next digit in our result. 
Result so far: 12947.0
Subtract 3563 from 3905 to get 342.
Append the next digit (3) from the dividend to 342 and continue with: 3423 / 509

Moving on to step 8:
When dividing 3423 by 509, we get 6 with a remainder of 369.
Use 6 as the next digit of our solution. 
Result so far: 129476.0
Subtract 3054 from 3423 to get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Going ahead to step 9:
3690 divided by 509 is 7 with a remainder of 127.
The number 7 becomes the next digit in our result. 
Result so far: 129476.7
Deduct 3563 from 3690 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

On to step 10:
The number 509 fits into 1270 2 times, leaving a remainder of 252.
Put 2 as the next digit of the answer. 
Result so far: 129476.72
Subtract 1018 from 1270 to get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Moving on to step 11:
509 can be fit into 2520 4 times, resulting in a remainder of 484.
The next digit of our result is 4. 
Result so far: 129476.724
Deduct 2036 from 2520 and we're left with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Going ahead to step 12:
If we divide 4840 by 509, we get 9 and a remainder of 259.
Write down 9 as next digit of the result. 
Result so far: 129476.7249
Deduct 4581 from 4840 and we're left with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Step 13:
509 goes into 2590 5 times with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 129476.72495
Subtracting 2545 from 2590 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 14:
509 can be fit into 450 0 times, resulting in a remainder of 450.
Record the quotient 0 as the next digit in the result. 
Result so far: 129476.72495
Deduct 0 from 450 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Step 15:
The number 509 fits into 4500 8 times, leaving a remainder of 428.
Write down 8 as next digit of the result. 
Result so far: 129476.7249508
The remainder is 428 after subtracting 4072 from 4500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

On to step 16:
4280 divided by 509 is 8 with a remainder of 208.
Use 8 as the next digit of our solution. 
Result so far: 129476.72495088
Deduct 4072 from 4280 and we're left 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 129476.72495088, with a leftover of 2.08e-07.