51409923 divided by 865 
We want to divide 51409923 by 865.

Moving on to step 1:
5 divided by 865 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 865

Moving on to step 2:
When dividing 51 by 865, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Grab the next digit (4) from the dividend, add it to 51, then carry on: 514 / 865

Let's proceed to step 3:
When dividing 514 by 865, we get 0 with a remainder of 514.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 514 and we're left with 514.
Grab the next digit (0) from the dividend, add it to 514, then carry on: 5140 / 865

On to step 4:
The number 865 fits into 5140 5 times, leaving a remainder of 815.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 4325 from 5140, we get 815.
Append the next digit (9) from the dividend to 815 and continue with: 8159 / 865

Moving on to step 5:
865 goes into 8159 9 times with a remainder of 374.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Subtract 7785 from 8159 to get 374.
Fetch the next digit (9) from the dividend, attach it to 374 and continue: 3749 / 865

Step 6:
If we divide 3749 by 865, we get 4 and a remainder of 289.
The next digit of our result is 4. 
Result so far: 594.0
Subtracting 3460 from 3749 leaves us with 289.
Bring next digit (2) of the dividend behind the 289 and repeat the process: 2892 / 865

Moving on to step 7:
When dividing 2892 by 865, we get 3 with a remainder of 297.
Put 3 as the next digit of the answer. 
Result so far: 5943.0
Subtract 2595 from 2892 to get 297.
Fetch the next digit (3) from the dividend, attach it to 297 and continue: 2973 / 865

On to step 8:
If we divide 2973 by 865, we get 3 and a remainder of 378.
The next digit of our result is 3. 
Result so far: 59433.0
Deduct 2595 from 2973 and we're left with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Step 9:
3780 divided by 865 is 4 with a remainder of 320.
Put 4 as the next digit of the answer. 
Result so far: 59433.4
Subtracting 3460 from 3780 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 10:
3200 divided by 865 is 3 with a remainder of 605.
The next digit of our result is 3. 
Result so far: 59433.43
If we take 2595 away from 3200, we end up with 605.
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 11:
865 can be fit into 6050 6 times, resulting in a remainder of 860.
Record the quotient 6 as the next digit in the result. 
Result so far: 59433.436
Subtracting 5190 from 6050 leaves us with 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8600, and continue the process.

Step 12:
When dividing 8600 by 865, we get 9 with a remainder of 815.
Put 9 as the next digit of the answer. 
Result so far: 59433.4369
Subtracting 7785 from 8600 leaves us with 815.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8150, and continue the process.

On to step 13:
865 can be fit into 8150 9 times, resulting in a remainder of 365.
Write down 9 as next digit of the result. 
Result so far: 59433.43699
Subtracting 7785 from 8150 leaves us with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

The quotient of the division is 59433.43699, and the remainder is 0.000365.