We're dividing 43591273 by 509 
Our goal is to divide 43591273 by 509.

Let's proceed to step 1:
4 divided by 509 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 509

Moving on to step 2:
If we divide 43 by 509, we get 0 and a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 509

Advancing to step 3:
If we divide 435 by 509, we get 0 and a remainder of 435.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 435, we get 435.
Take the next digit (9) from the dividend and append it to 435, then repeat: 4359 / 509

Advancing to step 4:
4359 divided by 509 is 8 with a remainder of 287.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 4072 from 4359 to get 287.
Fetch the next digit (1) from the dividend, attach it to 287 and continue: 2871 / 509

Going ahead to step 5:
2871 divided by 509 is 5 with a remainder of 326.
The next digit of our result is 5. 
Result so far: 85.0
If we take 2545 away from 2871, we end up with 326.
Take the next digit (2) from the dividend and append it to 326, then repeat: 3262 / 509

On to step 6:
The number 509 fits into 3262 6 times, leaving a remainder of 208.
Put 6 as the next digit of the answer. 
Result so far: 856.0
The remainder is 208 after subtracting 3054 from 3262.
Include the next digit (7) from the dividend after 208, then repeat: 2087 / 509

Going ahead to step 7:
The number 509 fits into 2087 4 times, leaving a remainder of 51.
Write down 4 as next digit of the result. 
Result so far: 8564.0
Subtract 2036 from 2087 to get 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 509

Going ahead to step 8:
509 can be fit into 513 1 times, resulting in a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 85641.0
Deduct 509 from 513 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
509 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 85641.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
509 can be fit into 400 0 times, resulting in a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 85641.0
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The quotient of the division is 85641.0, and the remainder is 0.4.