We look at the division of 13155451 by 45 
Let's see how many times 45 fits into 13155451.

On to step 1:
45 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 45

Going ahead to step 2:
45 goes into 13 0 times with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 45

Advancing to step 3:
45 can be fit into 131 2 times, resulting in a remainder of 41.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 41 after subtracting 90 from 131.
Fetch the next digit (5) from the dividend, attach it to 41 and continue: 415 / 45

On to step 4:
415 divided by 45 is 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 29.0
The remainder is 10 after subtracting 405 from 415.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 45

Let's proceed to step 5:
45 goes into 105 2 times with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 292.0
Subtract 90 from 105 to get 15.
Include the next digit (4) from the dividend after 15, then repeat: 154 / 45

On to step 6:
When dividing 154 by 45, we get 3 with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 2923.0
Deduct 135 from 154 and we're left with 19.
Fetch the next digit (5) from the dividend, attach it to 19 and continue: 195 / 45

Going ahead to step 7:
If we divide 195 by 45, we get 4 and a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 29234.0
If we subtract 180 from 195, we get 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 45

On to step 8:
45 can be fit into 151 3 times, resulting in a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 292343.0
The remainder is 16 after subtracting 135 from 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
If we divide 160 by 45, we get 3 and a remainder of 25.
Use 3 as the next digit of our solution. 
Result so far: 292343.3
If we take 135 away from 160, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 10:
250 divided by 45 is 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 292343.35
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
The number 45 fits into 250 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 292343.355
If we subtract 225 from 250, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The quotient of the division is 292343.355, and the remainder is 0.0025.