309985 ÷ 43 
Our goal is to divide 309985 by 43.

Let's proceed to step 1:
The number 43 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 43

On to step 2:
43 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Fetch the next digit (9) from the dividend, attach it to 30 and continue: 309 / 43

Step 3:
43 can be fit into 309 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 301 from 309, we get 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 43

Going ahead to step 4:
The number 43 fits into 89 2 times, leaving a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 72.0
Deduct 86 from 89 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 43

On to step 5:
43 can be fit into 38 0 times, resulting in a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 720.0
Subtracting 0 from 38 leaves us with 38.
Fetch the next digit (5) from the dividend, attach it to 38 and continue: 385 / 43

Step 6:
If we divide 385 by 43, we get 8 and a remainder of 41.
Write down 8 as next digit of the result. 
Result so far: 7208.0
The remainder is 41 after subtracting 344 from 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 7:
If we divide 410 by 43, we get 9 and a remainder of 23.
The next digit of our result is 9. 
Result so far: 7208.9
Deduct 387 from 410 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 8:
If we divide 230 by 43, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 7208.95
The remainder is 15 after subtracting 215 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
43 can be fit into 150 3 times, resulting in a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 7208.953
Subtract 129 from 150 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
The number 43 fits into 210 4 times, leaving a remainder of 38.
Record the quotient 4 as the next digit in the result. 
Result so far: 7208.9534
The remainder is 38 after subtracting 172 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 11:
The number 43 fits into 380 8 times, leaving a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 7208.95348
If we take 344 away from 380, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 12:
If we divide 360 by 43, we get 8 and a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 7208.953488
Deduct 344 from 360 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 7208.953488 and a remainder of 1.6e-06.