We're dividing 21409055 by 225 
We want to divide 21409055 by 225.

Moving on to step 1:
The number 225 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 225

Step 2:
21 divided by 225 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 225

Moving on to step 3:
225 can be fit into 214 0 times, resulting in a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 214, we get 214.
Include the next digit (0) from the dividend after 214, then repeat: 2140 / 225

Moving on to step 4:
225 can be fit into 2140 9 times, resulting in a remainder of 115.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 115 after subtracting 2025 from 2140.
Bring next digit (9) of the dividend behind the 115 and repeat the process: 1159 / 225

Going ahead to step 5:
If we divide 1159 by 225, we get 5 and a remainder of 34.
The next digit of our result is 5. 
Result so far: 95.0
The remainder is 34 after subtracting 1125 from 1159.
Include the next digit (0) from the dividend after 34, then repeat: 340 / 225

On to step 6:
225 can be fit into 340 1 times, resulting in a remainder of 115.
The number 1 becomes the next digit in our result. 
Result so far: 951.0
If we subtract 225 from 340, we get 115.
Bring next digit (5) of the dividend behind the 115 and repeat the process: 1155 / 225

Going ahead to step 7:
1155 divided by 225 is 5 with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 9515.0
If we subtract 1125 from 1155, we get 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 225

Step 8:
305 divided by 225 is 1 with a remainder of 80.
The next digit of our result is 1. 
Result so far: 95151.0
Subtracting 225 from 305 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
225 can be fit into 800 3 times, resulting in a remainder of 125.
Use 3 as the next digit of our solution. 
Result so far: 95151.3
If we subtract 675 from 800, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 10:
When dividing 1250 by 225, we get 5 with a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 95151.35
If we take 1125 away from 1250, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 11:
The number 225 fits into 1250 5 times, leaving a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 95151.355
Deduct 1125 from 1250 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Our division results in 95151.355 with a remaining 0.0125.