We look at the division of 42451053 by 252 
Let's see how many times 252 fits into 42451053.

Advancing to step 1:
252 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 252

Advancing to step 2:
42 divided by 252 is 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 252

On to step 3:
The number 252 fits into 424 1 times, leaving a remainder of 172.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 252 from 424 and we're left with 172.
Take the next digit (5) from the dividend and append it to 172, then repeat: 1725 / 252

Advancing to step 4:
252 goes into 1725 6 times with a remainder of 213.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
The remainder is 213 after subtracting 1512 from 1725.
Bring next digit (1) of the dividend behind the 213 and repeat the process: 2131 / 252

On to step 5:
The number 252 fits into 2131 8 times, leaving a remainder of 115.
The next digit of our result is 8. 
Result so far: 168.0
Subtracting 2016 from 2131 leaves us with 115.
Include the next digit (0) from the dividend after 115, then repeat: 1150 / 252

Step 6:
When dividing 1150 by 252, we get 4 with a remainder of 142.
Record the quotient 4 as the next digit in the result. 
Result so far: 1684.0
Deduct 1008 from 1150 and we're left with 142.
Fetch the next digit (5) from the dividend, attach it to 142 and continue: 1425 / 252

Let's proceed to step 7:
1425 divided by 252 is 5 with a remainder of 165.
Put 5 as the next digit of the answer. 
Result so far: 16845.0
If we take 1260 away from 1425, we end up with 165.
Take the next digit (3) from the dividend and append it to 165, then repeat: 1653 / 252

Going ahead to step 8:
252 can be fit into 1653 6 times, resulting in a remainder of 141.
The next digit of our result is 6. 
Result so far: 168456.0
The remainder is 141 after subtracting 1512 from 1653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Advancing to step 9:
252 can be fit into 1410 5 times, resulting in a remainder of 150.
Put 5 as the next digit of the answer. 
Result so far: 168456.5
Subtract 1260 from 1410 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 10:
When dividing 1500 by 252, we get 5 with a remainder of 240.
Put 5 as the next digit of the answer. 
Result so far: 168456.55
If we subtract 1260 from 1500, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Our division results in 168456.55 with a remaining 0.24.