Let's divide 20453801 by 90
Our goal is to divide 20453801 by 90.

Let's proceed to step 1:
90 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 90

Going ahead to step 2:
The number 90 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Fetch the next digit (4) from the dividend, attach it to 20 and continue: 204 / 90

Let's proceed to step 3:
The number 90 fits into 204 2 times, leaving a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 180 from 204 and we're left with 24.
Take the next digit (5) from the dividend and append it to 24, then repeat: 245 / 90

Going ahead to step 4:
245 divided by 90 is 2 with a remainder of 65.
Use 2 as the next digit of our solution. 
Result so far: 22.0
The remainder is 65 after subtracting 180 from 245.
Include the next digit (3) from the dividend after 65, then repeat: 653 / 90

Going ahead to step 5:
The number 90 fits into 653 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 227.0
Subtract 630 from 653 to get 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 90

Going ahead to step 6:
When dividing 238 by 90, we get 2 with a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 2272.0
Subtracting 180 from 238 leaves us with 58.
Fetch the next digit (0) from the dividend, attach it to 58 and continue: 580 / 90

Advancing to step 7:
90 can be fit into 580 6 times, resulting in a remainder of 40.
Put 6 as the next digit of the answer. 
Result so far: 22726.0
Deduct 540 from 580 and we're left with 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 90

Step 8:
90 can be fit into 401 4 times, resulting in a remainder of 41.
Put 4 as the next digit of the answer. 
Result so far: 227264.0
Subtract 360 from 401 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 9:
The number 90 fits into 410 4 times, leaving a remainder of 50.
The number 4 becomes the next digit in our result. 
Result so far: 227264.4
Deduct 360 from 410 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 10:
90 can be fit into 500 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 227264.45
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 11:
90 can be fit into 500 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 227264.455
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 227264.455, with a leftover of 0.005.