We look at the division of 51725234 by 309 
We want to figure out the number of times 51725234 can be divided by 309.

On to step 1:
If we divide 5 by 309, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 309

Step 2:
51 divided by 309 is 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (7) from the dividend after 51, then repeat: 517 / 309

Advancing to step 3:
309 can be fit into 517 1 times, resulting in a remainder of 208.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 309 from 517 leaves us with 208.
Take the next digit (2) from the dividend and append it to 208, then repeat: 2082 / 309

Going ahead to step 4:
The number 309 fits into 2082 6 times, leaving a remainder of 228.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we take 1854 away from 2082, we end up with 228.
Bring next digit (5) of the dividend behind the 228 and repeat the process: 2285 / 309

Let's proceed to step 5:
2285 divided by 309 is 7 with a remainder of 122.
Use 7 as the next digit of our solution. 
Result so far: 167.0
If we take 2163 away from 2285, we end up with 122.
Grab the next digit (2) from the dividend, add it to 122, then carry on: 1222 / 309

Going ahead to step 6:
309 goes into 1222 3 times with a remainder of 295.
The number 3 becomes the next digit in our result. 
Result so far: 1673.0
If we take 927 away from 1222, we end up with 295.
Take the next digit (3) from the dividend and append it to 295, then repeat: 2953 / 309

Let's proceed to step 7:
309 can be fit into 2953 9 times, resulting in a remainder of 172.
Use 9 as the next digit of our solution. 
Result so far: 16739.0
If we take 2781 away from 2953, we end up with 172.
Bring next digit (4) of the dividend behind the 172 and repeat the process: 1724 / 309

Let's proceed to step 8:
1724 divided by 309 is 5 with a remainder of 179.
Record the quotient 5 as the next digit in the result. 
Result so far: 167395.0
If we take 1545 away from 1724, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Step 9:
1790 divided by 309 is 5 with a remainder of 245.
Put 5 as the next digit of the answer. 
Result so far: 167395.5
Deduct 1545 from 1790 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 10:
2450 divided by 309 is 7 with a remainder of 287.
Put 7 as the next digit of the answer. 
Result so far: 167395.57
If we subtract 2163 from 2450, we get 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

On to step 11:
309 can be fit into 2870 9 times, resulting in a remainder of 89.
Write down 9 as next digit of the result. 
Result so far: 167395.579
Subtract 2781 from 2870 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 12:
309 goes into 890 2 times with a remainder of 272.
Use 2 as the next digit of our solution. 
Result so far: 167395.5792
Deduct 618 from 890 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 13:
If we divide 2720 by 309, we get 8 and a remainder of 248.
The next digit of our result is 8. 
Result so far: 167395.57928
Subtract 2472 from 2720 to get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Moving on to step 14:
309 can be fit into 2480 8 times, resulting in a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 167395.579288
If we subtract 2472 from 2480, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 167395.579288, with a leftover of 8e-07.