We look at the division of 623792 by 90 
Let's see how many times 90 fits into 623792.

On to step 1:
6 divided by 90 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 90

Moving on to step 2:
90 goes into 62 0 times with a remainder of 62.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 62 leaves us with 62.
Grab the next digit (3) from the dividend, add it to 62, then carry on: 623 / 90

Let's proceed to step 3:
90 goes into 623 6 times with a remainder of 83.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 540 from 623, we get 83.
Fetch the next digit (7) from the dividend, attach it to 83 and continue: 837 / 90

Going ahead to step 4:
90 can be fit into 837 9 times, resulting in a remainder of 27.
Put 9 as the next digit of the answer. 
Result so far: 69.0
The remainder is 27 after subtracting 810 from 837.
Append the next digit (9) from the dividend to 27 and continue with: 279 / 90

On to step 5:
If we divide 279 by 90, we get 3 and a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 693.0
Subtracting 270 from 279 leaves us with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 90

Advancing to step 6:
If we divide 92 by 90, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 6931.0
If we subtract 90 from 92, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
When dividing 20 by 90, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 6931.0
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
90 goes into 200 2 times with a remainder of 20.
The next digit of our result is 2. 
Result so far: 6931.02
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
The number 90 fits into 200 2 times, leaving a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 6931.022
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 6931.022, with a leftover of 0.002.