We're dividing 123886 by 30 
We want to figure out the number of times 123886 can be divided by 30.

On to step 1:
The number 30 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 30

Moving on to step 2:
12 divided by 30 is 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 30

Moving on to step 3:
If we divide 123 by 30, we get 4 and a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 120 from 123 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 30

Going ahead to step 4:
30 goes into 38 1 times with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 41.0
If we take 30 away from 38, we end up with 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 30

On to step 5:
The number 30 fits into 88 2 times, leaving a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 412.0
Subtract 60 from 88 to get 28.
Bring next digit (6) of the dividend behind the 28 and repeat the process: 286 / 30

Let's proceed to step 6:
30 goes into 286 9 times with a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 4129.0
If we take 270 away from 286, we end up 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.

Moving on to step 7:
30 can be fit into 160 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 4129.5
Subtracting 150 from 160 leaves us 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.

Let's proceed to step 8:
30 can be fit into 100 3 times, resulting in a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 4129.53
Deduct 90 from 100 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.

Moving on to step 9:
100 divided by 30 is 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 4129.533
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 4129.533, with a leftover of 0.001.