We look at the division of 51758708 by 321 
We're looking to find how many times 321 goes into 51758708.

Going ahead to step 1:
If we divide 5 by 321, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 321

Let's proceed to step 2:
When dividing 51 by 321, we get 0 with 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.
Include the next digit (7) from the dividend after 51, then repeat: 517 / 321

Let's proceed to step 3:
517 divided by 321 is 1 with a remainder of 196.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 196 after subtracting 321 from 517.
Take the next digit (5) from the dividend and append it to 196, then repeat: 1965 / 321

Let's proceed to step 4:
321 can be fit into 1965 6 times, resulting in a remainder of 39.
The next digit of our result is 6. 
Result so far: 16.0
Subtracting 1926 from 1965 leaves us with 39.
Include the next digit (8) from the dividend after 39, then repeat: 398 / 321

On to step 5:
The number 321 fits into 398 1 times, leaving a remainder of 77.
Write down 1 as next digit of the result. 
Result so far: 161.0
Subtract 321 from 398 to get 77.
Take the next digit (7) from the dividend and append it to 77, then repeat: 777 / 321

Step 6:
777 divided by 321 is 2 with a remainder of 135.
Put 2 as the next digit of the answer. 
Result so far: 1612.0
Deduct 642 from 777 and we're left with 135.
Include the next digit (0) from the dividend after 135, then repeat: 1350 / 321

Let's proceed to step 7:
321 can be fit into 1350 4 times, resulting in a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 16124.0
Deduct 1284 from 1350 and we're left with 66.
Include the next digit (8) from the dividend after 66, then repeat: 668 / 321

Moving on to step 8:
321 goes into 668 2 times with a remainder of 26.
The next digit of our result is 2. 
Result so far: 161242.0
If we take 642 away from 668, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 9:
The number 321 fits into 260 0 times, leaving a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 161242.0
Subtracting 0 from 260 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 10:
If we divide 2600 by 321, we get 8 and a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 161242.08
The remainder is 32 after subtracting 2568 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 11:
The number 321 fits into 320 0 times, leaving a remainder of 320.
Use 0 as the next digit of our solution. 
Result so far: 161242.08
The remainder is 320 after subtracting 0 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 12:
321 can be fit into 3200 9 times, resulting in a remainder of 311.
The next digit of our result is 9. 
Result so far: 161242.0809
Subtract 2889 from 3200 to get 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Going ahead to step 13:
If we divide 3110 by 321, we get 9 and a remainder of 221.
Use 9 as the next digit of our solution. 
Result so far: 161242.08099
If we take 2889 away from 3110, we end up with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

After the division, we end up with 161242.08099 and a remainder of 0.000221.