We look at the division of 9860171 by 309 
We want to figure out the number of times 9860171 can be divided by 309.

Step 1:
The number 309 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 309

On to step 2:
The number 309 fits into 98 0 times, leaving a remainder of 98.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 98 after subtracting 0 from 98.
Fetch the next digit (6) from the dividend, attach it to 98 and continue: 986 / 309

Moving on to step 3:
309 can be fit into 986 3 times, resulting in a remainder of 59.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 927 from 986 to get 59.
Grab the next digit (0) from the dividend, add it to 59, then carry on: 590 / 309

Let's proceed to step 4:
309 goes into 590 1 times with a remainder of 281.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we subtract 309 from 590, we get 281.
Fetch the next digit (1) from the dividend, attach it to 281 and continue: 2811 / 309

Advancing to step 5:
The number 309 fits into 2811 9 times, leaving a remainder of 30.
Record the quotient 9 as the next digit in the result. 
Result so far: 319.0
Subtracting 2781 from 2811 leaves us with 30.
Take the next digit (7) from the dividend and append it to 30, then repeat: 307 / 309

On to step 6:
307 divided by 309 is 0 with a remainder of 307.
Use 0 as the next digit of our solution. 
Result so far: 3190.0
Deduct 0 from 307 and we're left with 307.
Include the next digit (1) from the dividend after 307, then repeat: 3071 / 309

Moving on to step 7:
If we divide 3071 by 309, we get 9 and a remainder of 290.
The next digit of our result is 9. 
Result so far: 31909.0
The remainder is 290 after subtracting 2781 from 3071.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

On to step 8:
2900 divided by 309 is 9 with a remainder of 119.
Write down 9 as next digit of the result. 
Result so far: 31909.9
Subtract 2781 from 2900 to get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

On to step 9:
309 can be fit into 1190 3 times, resulting in a remainder of 263.
The next digit of our result is 3. 
Result so far: 31909.93
The remainder is 263 after subtracting 927 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Advancing to step 10:
309 can be fit into 2630 8 times, resulting in a remainder of 158.
The next digit of our result is 8. 
Result so far: 31909.938
The remainder is 158 after subtracting 2472 from 2630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Let's proceed to step 11:
309 can be fit into 1580 5 times, resulting in a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 31909.9385
Subtract 1545 from 1580 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 12:
The number 309 fits into 350 1 times, leaving a remainder of 41.
Record the quotient 1 as the next digit in the result. 
Result so far: 31909.93851
Subtracting 309 from 350 leaves us with 41.
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 13:
The number 309 fits into 410 1 times, leaving a remainder of 101.
Put 1 as the next digit of the answer. 
Result so far: 31909.938511
Subtracting 309 from 410 leaves us with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

After the division, we end up with 31909.938511 and a remainder of 1.01e-05.