We're dividing 51445254 by 630 
We want to divide 51445254 by 630.

Step 1:
630 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 630

Let's proceed to step 2:
630 can be fit into 51 0 times, resulting in a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Take the next digit (4) from the dividend and append it to 51, then repeat: 514 / 630

Advancing to step 3:
If we divide 514 by 630, we get 0 and a remainder of 514.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 514 to get 514.
Append the next digit (4) from the dividend to 514 and continue with: 5144 / 630

On to step 4:
630 can be fit into 5144 8 times, resulting in a remainder of 104.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 5040 from 5144, we get 104.
Grab the next digit (5) from the dividend, add it to 104, then carry on: 1045 / 630

On to step 5:
The number 630 fits into 1045 1 times, leaving a remainder of 415.
Write down 1 as next digit of the result. 
Result so far: 81.0
Subtract 630 from 1045 to get 415.
Fetch the next digit (2) from the dividend, attach it to 415 and continue: 4152 / 630

Advancing to step 6:
4152 divided by 630 is 6 with a remainder of 372.
The next digit of our result is 6. 
Result so far: 816.0
Subtract 3780 from 4152 to get 372.
Grab the next digit (5) from the dividend, add it to 372, then carry on: 3725 / 630

Advancing to step 7:
When dividing 3725 by 630, we get 5 with a remainder of 575.
The number 5 becomes the next digit in our result. 
Result so far: 8165.0
If we take 3150 away from 3725, we end up with 575.
Fetch the next digit (4) from the dividend, attach it to 575 and continue: 5754 / 630

Step 8:
630 goes into 5754 9 times with a remainder of 84.
The next digit of our result is 9. 
Result so far: 81659.0
Subtract 5670 from 5754 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 9:
630 goes into 840 1 times with a remainder of 210.
Record the quotient 1 as the next digit in the result. 
Result so far: 81659.1
Deduct 630 from 840 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 10:
630 can be fit into 2100 3 times, resulting in a remainder of 210.
Put 3 as the next digit of the answer. 
Result so far: 81659.13
The remainder is 210 after subtracting 1890 from 2100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 11:
630 can be fit into 2100 3 times, resulting in a remainder of 210.
The number 3 becomes the next digit in our result. 
Result so far: 81659.133
Deduct 1890 from 2100 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

After the division, we end up with 81659.133 and a remainder of 0.021.