We look at the division of 186309 by 90 
We want to divide 186309 by 90.

Advancing to step 1:
When dividing 1 by 90, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 90

Moving on to step 2:
If we divide 18 by 90, we get 0 and a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Append the next digit (6) from the dividend to 18 and continue with: 186 / 90

Advancing to step 3:
90 can be fit into 186 2 times, resulting in a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 180 from 186 to get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 90

Step 4:
The number 90 fits into 63 0 times, leaving a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 63 to get 63.
Take the next digit (0) from the dividend and append it to 63, then repeat: 630 / 90

Let's proceed to step 5:
630 divided by 90 is 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 207.0
If we take 630 away from 630, we end up with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 90

Moving on to step 6:
When dividing 9 by 90, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 2070.0
If we take 0 away from 9, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
90 goes into 90 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 2070.1
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2070.1
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
If we divide 0 by 90, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 2070.1
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 2070.1 and a remainder of 0.0.