We divide 186390 by 81
Let's see how many times 81 fits into 186390.

Let's proceed to step 1:
1 divided by 81 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 81

Going ahead to step 2:
18 divided by 81 is 0 with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Take the next digit (6) from the dividend and append it to 18, then repeat: 186 / 81

Advancing to step 3:
If we divide 186 by 81, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 24 after subtracting 162 from 186.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 81

Moving on to step 4:
81 can be fit into 243 3 times, resulting in a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 23.0
Deduct 243 from 243 and we're left with 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 81

Step 5:
If we divide 9 by 81, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 230.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 81

Step 6:
The number 81 fits into 90 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2301.0
If we subtract 81 from 90, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
When dividing 90 by 81, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2301.1
Subtract 81 from 90 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
When dividing 90 by 81, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 2301.11
Subtract 81 from 90 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 2301.11 with a remaining 0.009.