51913160 ÷ 807 
We want to figure out the number of times 51913160 can be divided by 807.

Moving on to step 1:
When dividing 5 by 807, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 807

Going ahead to step 2:
807 can be fit into 51 0 times, resulting in a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (9) from the dividend after 51, then repeat: 519 / 807

On to step 3:
If we divide 519 by 807, we get 0 and a remainder of 519.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 519 to get 519.
Take the next digit (1) from the dividend and append it to 519, then repeat: 5191 / 807

Advancing to step 4:
807 goes into 5191 6 times with a remainder of 349.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 4842 from 5191, we get 349.
Take the next digit (3) from the dividend and append it to 349, then repeat: 3493 / 807

Going ahead to step 5:
3493 divided by 807 is 4 with a remainder of 265.
Use 4 as the next digit of our solution. 
Result so far: 64.0
If we take 3228 away from 3493, we end up with 265.
Bring next digit (1) of the dividend behind the 265 and repeat the process: 2651 / 807

Step 6:
When dividing 2651 by 807, we get 3 with a remainder of 230.
Write down 3 as next digit of the result. 
Result so far: 643.0
The remainder is 230 after subtracting 2421 from 2651.
Append the next digit (6) from the dividend to 230 and continue with: 2306 / 807

Going ahead to step 7:
807 can be fit into 2306 2 times, resulting in a remainder of 692.
The number 2 becomes the next digit in our result. 
Result so far: 6432.0
If we subtract 1614 from 2306, we get 692.
Append the next digit (0) from the dividend to 692 and continue with: 6920 / 807

On to step 8:
The number 807 fits into 6920 8 times, leaving a remainder of 464.
Write down 8 as next digit of the result. 
Result so far: 64328.0
Subtracting 6456 from 6920 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Moving on to step 9:
The number 807 fits into 4640 5 times, leaving a remainder of 605.
Use 5 as the next digit of our solution. 
Result so far: 64328.5
The remainder is 605 after subtracting 4035 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Going ahead to step 10:
The number 807 fits into 6050 7 times, leaving a remainder of 401.
Use 7 as the next digit of our solution. 
Result so far: 64328.57
Subtract 5649 from 6050 to get 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Going ahead to step 11:
807 can be fit into 4010 4 times, resulting in a remainder of 782.
Write down 4 as next digit of the result. 
Result so far: 64328.574
Subtract 3228 from 4010 to get 782.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7820, and continue the process.

Moving on to step 12:
When dividing 7820 by 807, we get 9 with a remainder of 557.
The number 9 becomes the next digit in our result. 
Result so far: 64328.5749
The remainder is 557 after subtracting 7263 from 7820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5570, and continue the process.

On to step 13:
807 can be fit into 5570 6 times, resulting in a remainder of 728.
The number 6 becomes the next digit in our result. 
Result so far: 64328.57496
Deduct 4842 from 5570 and we're left with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Step 14:
807 can be fit into 7280 9 times, resulting in a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 64328.574969
The remainder is 17 after subtracting 7263 from 7280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 15:
The number 807 fits into 170 0 times, leaving a remainder of 170.
Use 0 as the next digit of our solution. 
Result so far: 64328.574969
If we take 0 away from 170, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 16:
1700 divided by 807 is 2 with a remainder of 86.
The next digit of our result is 2. 
Result so far: 64328.57496902
The remainder is 86 after subtracting 1614 from 1700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

The final result is 64328.57496902 with a remainder of 8.6e-08.