We divide 237993 by 90
We're looking to find how many times 90 goes into 237993.

Going ahead to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 90

Advancing to step 2:
90 can be fit into 23 0 times, resulting in a remainder of 23.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 23 leaves us with 23.
Bring next digit (7) of the dividend behind the 23 and repeat the process: 237 / 90

Step 3:
When dividing 237 by 90, we get 2 with a remainder of 57.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 180 from 237 to get 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 90

Let's proceed to step 4:
When dividing 579 by 90, we get 6 with a remainder of 39.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
The remainder is 39 after subtracting 540 from 579.
Include the next digit (9) from the dividend after 39, then repeat: 399 / 90

Going ahead to step 5:
399 divided by 90 is 4 with a remainder of 39.
Write down 4 as next digit of the result. 
Result so far: 264.0
If we take 360 away from 399, we end up with 39.
Grab the next digit (3) from the dividend, add it to 39, then carry on: 393 / 90

Step 6:
The number 90 fits into 393 4 times, leaving a remainder of 33.
The next digit of our result is 4. 
Result so far: 2644.0
If we take 360 away from 393, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 7:
If we divide 330 by 90, we get 3 and a remainder of 60.
Put 3 as the next digit of the answer. 
Result so far: 2644.3
If we take 270 away from 330, we end up 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.

Going ahead to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 2644.36
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.

Going ahead to step 9:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 2644.366
If we take 540 away from 600, we end up 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.

The final result is 2644.366 with a remainder of 0.006.