53712514 ÷ 339 
Let's see how many times 339 fits into 53712514.

Moving on to step 1:
When dividing 5 by 339, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 339

Moving on to step 2:
The number 339 fits into 53 0 times, leaving a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Fetch the next digit (7) from the dividend, attach it to 53 and continue: 537 / 339

Step 3:
If we divide 537 by 339, we get 1 and a remainder of 198.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 339 from 537 and we're left with 198.
Take the next digit (1) from the dividend and append it to 198, then repeat: 1981 / 339

Advancing to step 4:
339 goes into 1981 5 times with a remainder of 286.
Write down 5 as next digit of the result. 
Result so far: 15.0
Deduct 1695 from 1981 and we're left with 286.
Include the next digit (2) from the dividend after 286, then repeat: 2862 / 339

Let's proceed to step 5:
339 goes into 2862 8 times with a remainder of 150.
Record the quotient 8 as the next digit in the result. 
Result so far: 158.0
If we subtract 2712 from 2862, we get 150.
Bring next digit (5) of the dividend behind the 150 and repeat the process: 1505 / 339

Step 6:
1505 divided by 339 is 4 with a remainder of 149.
The next digit of our result is 4. 
Result so far: 1584.0
Subtract 1356 from 1505 to get 149.
Include the next digit (1) from the dividend after 149, then repeat: 1491 / 339

Let's proceed to step 7:
1491 divided by 339 is 4 with a remainder of 135.
Use 4 as the next digit of our solution. 
Result so far: 15844.0
Subtracting 1356 from 1491 leaves us with 135.
Append the next digit (4) from the dividend to 135 and continue with: 1354 / 339

Going ahead to step 8:
339 can be fit into 1354 3 times, resulting in a remainder of 337.
Record the quotient 3 as the next digit in the result. 
Result so far: 158443.0
Deduct 1017 from 1354 and we're left with 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Let's proceed to step 9:
339 goes into 3370 9 times with a remainder of 319.
Use 9 as the next digit of our solution. 
Result so far: 158443.9
Subtracting 3051 from 3370 leaves us with 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Going ahead to step 10:
339 goes into 3190 9 times with a remainder of 139.
Use 9 as the next digit of our solution. 
Result so far: 158443.99
If we take 3051 away from 3190, we end up with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

The final result is 158443.99 with a remainder of 0.139.