We divide 105243 by 90
Our goal is to divide 105243 by 90.

Advancing to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 90

On to step 2:
The number 90 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 90

Moving on to step 3:
When dividing 105 by 90, we get 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 90 from 105, we get 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 90

Advancing to step 4:
90 can be fit into 152 1 times, resulting in a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 90 away from 152, we end up with 62.
Include the next digit (4) from the dividend after 62, then repeat: 624 / 90

Going ahead to step 5:
When dividing 624 by 90, we get 6 with a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 116.0
Subtracting 540 from 624 leaves us with 84.
Include the next digit (3) from the dividend after 84, then repeat: 843 / 90

On to step 6:
843 divided by 90 is 9 with a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 1169.0
Subtract 810 from 843 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
When dividing 330 by 90, we get 3 with a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 1169.3
The remainder is 60 after subtracting 270 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 8:
If we divide 600 by 90, we get 6 and a remainder of 60.
The next digit of our result is 6. 
Result so far: 1169.36
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 1169.366
Subtract 540 from 600 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 1169.366 and a remainder of 0.006.