We look at the division of 163987 by 90 
We're looking to find how many times 90 goes into 163987.

Advancing to step 1:
1 divided by 90 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 90

On to step 2:
90 goes into 16 0 times with a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 90

Step 3:
When dividing 163 by 90, we get 1 with a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 73 after subtracting 90 from 163.
Append the next digit (9) from the dividend to 73 and continue with: 739 / 90

Going ahead to step 4:
90 can be fit into 739 8 times, resulting in a remainder of 19.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtracting 720 from 739 leaves us with 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 90

Going ahead to step 5:
When dividing 198 by 90, we get 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 182.0
If we subtract 180 from 198, we get 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 90

Let's proceed to step 6:
187 divided by 90 is 2 with a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 1822.0
Subtract 180 from 187 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.

On to step 7:
The number 90 fits into 70 0 times, leaving a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 1822.0
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 8:
90 goes into 700 7 times with a remainder of 70.
The next digit of our result is 7. 
Result so far: 1822.07
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
When dividing 700 by 90, we get 7 with a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 1822.077
Deduct 630 from 700 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Our division results in 1822.077 with a remaining 0.007.