We look at the division of 51086 by 18 
We want to figure out the number of times 51086 can be divided by 18.

Moving on to step 1:
The number 18 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 18

Step 2:
If we divide 51 by 18, we get 2 and a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 36 from 51 leaves us with 15.
Grab the next digit (0) from the dividend, add it to 15, then carry on: 150 / 18

Moving on to step 3:
150 divided by 18 is 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 28.0
Deduct 144 from 150 and we're left with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 18

Going ahead to step 4:
When dividing 68 by 18, we get 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 283.0
If we subtract 54 from 68, we get 14.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 18

Going ahead to step 5:
If we divide 146 by 18, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 2838.0
If we subtract 144 from 146, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 6:
If we divide 20 by 18, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 2838.1
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
20 divided by 18 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 2838.11
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 2838.11 with a remaining 0.002.