23839009 ÷ 309 
We want to figure out the number of times 23839009 can be divided by 309.

Moving on to step 1:
2 divided by 309 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 309

Step 2:
23 divided by 309 is 0 with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Take the next digit (8) from the dividend and append it to 23, then repeat: 238 / 309

Going ahead to step 3:
When dividing 238 by 309, we get 0 with a remainder of 238.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 238 leaves us with 238.
Include the next digit (3) from the dividend after 238, then repeat: 2383 / 309

Let's proceed to step 4:
If we divide 2383 by 309, we get 7 and a remainder of 220.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 2163 from 2383 leaves us with 220.
Append the next digit (9) from the dividend to 220 and continue with: 2209 / 309

On to step 5:
If we divide 2209 by 309, we get 7 and a remainder of 46.
Write down 7 as next digit of the result. 
Result so far: 77.0
If we subtract 2163 from 2209, we get 46.
Grab the next digit (0) from the dividend, add it to 46, then carry on: 460 / 309

Moving on to step 6:
460 divided by 309 is 1 with a remainder of 151.
The next digit of our result is 1. 
Result so far: 771.0
Subtracting 309 from 460 leaves us with 151.
Grab the next digit (0) from the dividend, add it to 151, then carry on: 1510 / 309

Going ahead to step 7:
When dividing 1510 by 309, we get 4 with a remainder of 274.
Use 4 as the next digit of our solution. 
Result so far: 7714.0
If we subtract 1236 from 1510, we get 274.
Take the next digit (9) from the dividend and append it to 274, then repeat: 2749 / 309

Step 8:
309 goes into 2749 8 times with a remainder of 277.
Record the quotient 8 as the next digit in the result. 
Result so far: 77148.0
Subtracting 2472 from 2749 leaves us with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Moving on to step 9:
309 goes into 2770 8 times with a remainder of 298.
The next digit of our result is 8. 
Result so far: 77148.8
The remainder is 298 after subtracting 2472 from 2770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

On to step 10:
If we divide 2980 by 309, we get 9 and a remainder of 199.
Write down 9 as next digit of the result. 
Result so far: 77148.89
Deduct 2781 from 2980 and we're left with 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

On to step 11:
If we divide 1990 by 309, we get 6 and a remainder of 136.
Put 6 as the next digit of the answer. 
Result so far: 77148.896
Deduct 1854 from 1990 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 12:
When dividing 1360 by 309, we get 4 with a remainder of 124.
The number 4 becomes the next digit in our result. 
Result so far: 77148.8964
If we take 1236 away from 1360, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 13:
The number 309 fits into 1240 4 times, leaving a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 77148.89644
Deduct 1236 from 1240 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.

Our division results in 77148.89644 with a remaining 4e-06.