We look at the division of 45129545 by 343 
Our goal is to divide 45129545 by 343.

Going ahead to step 1:
If we divide 4 by 343, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 343

Advancing to step 2:
The number 343 fits into 45 0 times, leaving a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Take the next digit (1) from the dividend and append it to 45, then repeat: 451 / 343

On to step 3:
451 divided by 343 is 1 with a remainder of 108.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 343 from 451 and we're left with 108.
Fetch the next digit (2) from the dividend, attach it to 108 and continue: 1082 / 343

Let's proceed to step 4:
If we divide 1082 by 343, we get 3 and a remainder of 53.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Deduct 1029 from 1082 and we're left with 53.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 343

Let's proceed to step 5:
If we divide 539 by 343, we get 1 and a remainder of 196.
Record the quotient 1 as the next digit in the result. 
Result so far: 131.0
Subtract 343 from 539 to get 196.
Include the next digit (5) from the dividend after 196, then repeat: 1965 / 343

Let's proceed to step 6:
343 goes into 1965 5 times with a remainder of 250.
Write down 5 as next digit of the result. 
Result so far: 1315.0
Deduct 1715 from 1965 and we're left with 250.
Grab the next digit (4) from the dividend, add it to 250, then carry on: 2504 / 343

Step 7:
343 can be fit into 2504 7 times, resulting in a remainder of 103.
Record the quotient 7 as the next digit in the result. 
Result so far: 13157.0
Subtracting 2401 from 2504 leaves us with 103.
Append the next digit (5) from the dividend to 103 and continue with: 1035 / 343

Step 8:
343 goes into 1035 3 times with a remainder of 6.
The next digit of our result is 3. 
Result so far: 131573.0
Subtract 1029 from 1035 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
When dividing 60 by 343, we get 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 131573.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
The number 343 fits into 600 1 times, leaving a remainder of 257.
Record the quotient 1 as the next digit in the result. 
Result so far: 131573.01
Deduct 343 from 600 and we're left with 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Going ahead to step 11:
343 can be fit into 2570 7 times, resulting in a remainder of 169.
Use 7 as the next digit of our solution. 
Result so far: 131573.017
Subtract 2401 from 2570 to get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Let's proceed to step 12:
343 goes into 1690 4 times with a remainder of 318.
The number 4 becomes the next digit in our result. 
Result so far: 131573.0174
The remainder is 318 after subtracting 1372 from 1690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Moving on to step 13:
343 goes into 3180 9 times with a remainder of 93.
Use 9 as the next digit of our solution. 
Result so far: 131573.01749
Subtracting 3087 from 3180 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

On to step 14:
343 can be fit into 930 2 times, resulting in a remainder of 244.
Write down 2 as next digit of the result. 
Result so far: 131573.017492
Subtracting 686 from 930 leaves us with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 15:
The number 343 fits into 2440 7 times, leaving a remainder of 39.
The next digit of our result is 7. 
Result so far: 131573.0174927
If we take 2401 away from 2440, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 16:
The number 343 fits into 390 1 times, leaving a remainder of 47.
Write down 1 as next digit of the result. 
Result so far: 131573.01749271
Subtracting 343 from 390 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final outcome is 131573.01749271, with a leftover of 4.7e-08.