Let's divide 120871 by 12
Let's see how many times 12 fits into 120871.

Going ahead to step 1:
12 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 12

Advancing to step 2:
The number 12 fits into 12 1 times, leaving a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we take 12 away from 12, we end up with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 12

Step 3:
12 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 0 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 12

On to step 4:
12 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 100.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 12

Step 5:
The number 12 fits into 87 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 1007.0
Subtracting 84 from 87 leaves us with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 12

Step 6:
When dividing 31 by 12, we get 2 with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 10072.0
Subtract 24 from 31 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
The number 12 fits into 70 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 10072.5
Deduct 60 from 70 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
When dividing 100 by 12, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 10072.58
Subtract 96 from 100 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 10072.583
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
If we divide 40 by 12, we get 3 and a remainder of 4.
The next digit of our result is 3. 
Result so far: 10072.5833
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 10072.5833, with a leftover of 4e-05.