We look at the division of 21788364 by 45 
Let's see how many times 45 fits into 21788364.

Going ahead to step 1:
When dividing 2 by 45, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 45

On to step 2:
21 divided by 45 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Fetch the next digit (7) from the dividend, attach it to 21 and continue: 217 / 45

Step 3:
45 can be fit into 217 4 times, resulting in a remainder of 37.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 37 after subtracting 180 from 217.
Fetch the next digit (8) from the dividend, attach it to 37 and continue: 378 / 45

Let's proceed to step 4:
When dividing 378 by 45, we get 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we take 360 away from 378, we end up with 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 45

On to step 5:
45 goes into 188 4 times with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 484.0
If we take 180 away from 188, we end up with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 45

Advancing to step 6:
83 divided by 45 is 1 with a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 4841.0
Subtracting 45 from 83 leaves us with 38.
Grab the next digit (6) from the dividend, add it to 38, then carry on: 386 / 45

Let's proceed to step 7:
The number 45 fits into 386 8 times, leaving a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 48418.0
Deduct 360 from 386 and we're left with 26.
Take the next digit (4) from the dividend and append it to 26, then repeat: 264 / 45

Step 8:
When dividing 264 by 45, we get 5 with a remainder of 39.
The next digit of our result is 5. 
Result so far: 484185.0
Subtract 225 from 264 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
390 divided by 45 is 8 with a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 484185.8
Deduct 360 from 390 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 10:
When dividing 300 by 45, we get 6 with a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 484185.86
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
300 divided by 45 is 6 with a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 484185.866
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 484185.866 with a remainder of 0.003.