51431408 ÷ 320 
Our goal is to divide 51431408 by 320.

Advancing to step 1:
320 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 320

Step 2:
320 goes into 51 0 times with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Bring next digit (4) of the dividend behind the 51 and repeat the process: 514 / 320

Going ahead to step 3:
If we divide 514 by 320, we get 1 and a remainder of 194.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 320 from 514 and we're left with 194.
Append the next digit (3) from the dividend to 194 and continue with: 1943 / 320

Step 4:
320 can be fit into 1943 6 times, resulting in a remainder of 23.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 1920 from 1943, we get 23.
Append the next digit (1) from the dividend to 23 and continue with: 231 / 320

Step 5:
320 goes into 231 0 times with a remainder of 231.
The number 0 becomes the next digit in our result. 
Result so far: 160.0
Subtracting 0 from 231 leaves us with 231.
Append the next digit (4) from the dividend to 231 and continue with: 2314 / 320

Going ahead to step 6:
The number 320 fits into 2314 7 times, leaving a remainder of 74.
Write down 7 as next digit of the result. 
Result so far: 1607.0
If we subtract 2240 from 2314, we get 74.
Take the next digit (0) from the dividend and append it to 74, then repeat: 740 / 320

Let's proceed to step 7:
When dividing 740 by 320, we get 2 with a remainder of 100.
Use 2 as the next digit of our solution. 
Result so far: 16072.0
Deduct 640 from 740 and we're left with 100.
Include the next digit (8) from the dividend after 100, then repeat: 1008 / 320

On to step 8:
If we divide 1008 by 320, we get 3 and a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 160723.0
If we take 960 away from 1008, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 9:
The number 320 fits into 480 1 times, leaving a remainder of 160.
The next digit of our result is 1. 
Result so far: 160723.1
Subtract 320 from 480 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 10:
The number 320 fits into 1600 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 160723.15
The remainder is 0 after subtracting 1600 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 11:
320 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 160723.15
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 12:
0 divided by 320 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 160723.15
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 160723.15 with a remainder of 0.0.