Let's divide 51010309 by 807
We want to divide 51010309 by 807.

Let's proceed to step 1:
5 divided by 807 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 807

Advancing to step 2:
The number 807 fits into 51 0 times, leaving a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Bring next digit (0) of the dividend behind the 51 and repeat the process: 510 / 807

Step 3:
807 goes into 510 0 times with a remainder of 510.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 510 leaves us with 510.
Include the next digit (1) from the dividend after 510, then repeat: 5101 / 807

Moving on to step 4:
If we divide 5101 by 807, we get 6 and a remainder of 259.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 4842 from 5101, we get 259.
Append the next digit (0) from the dividend to 259 and continue with: 2590 / 807

On to step 5:
807 can be fit into 2590 3 times, resulting in a remainder of 169.
Write down 3 as next digit of the result. 
Result so far: 63.0
If we take 2421 away from 2590, we end up with 169.
Take the next digit (3) from the dividend and append it to 169, then repeat: 1693 / 807

Moving on to step 6:
1693 divided by 807 is 2 with a remainder of 79.
Write down 2 as next digit of the result. 
Result so far: 632.0
The remainder is 79 after subtracting 1614 from 1693.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 807

Let's proceed to step 7:
If we divide 790 by 807, we get 0 and a remainder of 790.
Use 0 as the next digit of our solution. 
Result so far: 6320.0
Subtract 0 from 790 to get 790.
Bring next digit (9) of the dividend behind the 790 and repeat the process: 7909 / 807

On to step 8:
807 can be fit into 7909 9 times, resulting in a remainder of 646.
The next digit of our result is 9. 
Result so far: 63209.0
The remainder is 646 after subtracting 7263 from 7909.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

Step 9:
807 goes into 6460 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 63209.8
Subtracting 6456 from 6460 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
807 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 63209.8
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 11:
If we divide 400 by 807, we get 0 and a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 63209.8
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Our division results in 63209.8 with a remaining 0.04.