We're dividing 80145310 by 309 
We want to figure out the number of times 80145310 can be divided by 309.

On to step 1:
The number 309 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 309

Let's proceed to step 2:
When dividing 80 by 309, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 309

Moving on to step 3:
The number 309 fits into 801 2 times, leaving a remainder of 183.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 618 away from 801, we end up with 183.
Include the next digit (4) from the dividend after 183, then repeat: 1834 / 309

Moving on to step 4:
If we divide 1834 by 309, we get 5 and a remainder of 289.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we subtract 1545 from 1834, we get 289.
Grab the next digit (5) from the dividend, add it to 289, then carry on: 2895 / 309

Advancing to step 5:
309 goes into 2895 9 times with a remainder of 114.
Record the quotient 9 as the next digit in the result. 
Result so far: 259.0
The remainder is 114 after subtracting 2781 from 2895.
Fetch the next digit (3) from the dividend, attach it to 114 and continue: 1143 / 309

On to step 6:
1143 divided by 309 is 3 with a remainder of 216.
Write down 3 as next digit of the result. 
Result so far: 2593.0
The remainder is 216 after subtracting 927 from 1143.
Include the next digit (1) from the dividend after 216, then repeat: 2161 / 309

Let's proceed to step 7:
309 can be fit into 2161 6 times, resulting in a remainder of 307.
The number 6 becomes the next digit in our result. 
Result so far: 25936.0
The remainder is 307 after subtracting 1854 from 2161.
Take the next digit (0) from the dividend and append it to 307, then repeat: 3070 / 309

On to step 8:
The number 309 fits into 3070 9 times, leaving a remainder of 289.
Put 9 as the next digit of the answer. 
Result so far: 259369.0
Subtract 2781 from 3070 to get 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Step 9:
When dividing 2890 by 309, we get 9 with a remainder of 109.
Use 9 as the next digit of our solution. 
Result so far: 259369.9
Deduct 2781 from 2890 and we're left with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 10:
When dividing 1090 by 309, we get 3 with a remainder of 163.
Write down 3 as next digit of the result. 
Result so far: 259369.93
If we subtract 927 from 1090, we get 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Step 11:
309 goes into 1630 5 times with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 259369.935
If we subtract 1545 from 1630, we get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Going ahead to step 12:
850 divided by 309 is 2 with a remainder of 232.
The number 2 becomes the next digit in our result. 
Result so far: 259369.9352
Subtracting 618 from 850 leaves us with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 13:
2320 divided by 309 is 7 with a remainder of 157.
Use 7 as the next digit of our solution. 
Result so far: 259369.93527
Subtracting 2163 from 2320 leaves us with 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Advancing to step 14:
When dividing 1570 by 309, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 259369.935275
Subtracting 1545 from 1570 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 15:
309 can be fit into 250 0 times, resulting in a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 259369.935275
The remainder is 250 after subtracting 0 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 16:
When dividing 2500 by 309, we get 8 with a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 259369.93527508
Deduct 2472 from 2500 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 259369.93527508 and a remainder of 2.8e-08.