Let's divide 51398354 by 343
We want to divide 51398354 by 343.

Moving on to step 1:
343 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 343

Step 2:
51 divided by 343 is 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 343

Let's proceed to step 3:
343 can be fit into 513 1 times, resulting in a remainder of 170.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 170 after subtracting 343 from 513.
Grab the next digit (9) from the dividend, add it to 170, then carry on: 1709 / 343

Moving on to step 4:
When dividing 1709 by 343, we get 4 with a remainder of 337.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Deduct 1372 from 1709 and we're left with 337.
Fetch the next digit (8) from the dividend, attach it to 337 and continue: 3378 / 343

Let's proceed to step 5:
343 goes into 3378 9 times with a remainder of 291.
Record the quotient 9 as the next digit in the result. 
Result so far: 149.0
Deduct 3087 from 3378 and we're left with 291.
Grab the next digit (3) from the dividend, add it to 291, then carry on: 2913 / 343

Step 6:
The number 343 fits into 2913 8 times, leaving a remainder of 169.
Write down 8 as next digit of the result. 
Result so far: 1498.0
If we take 2744 away from 2913, we end up with 169.
Grab the next digit (5) from the dividend, add it to 169, then carry on: 1695 / 343

On to step 7:
1695 divided by 343 is 4 with a remainder of 323.
The next digit of our result is 4. 
Result so far: 14984.0
Deduct 1372 from 1695 and we're left with 323.
Take the next digit (4) from the dividend and append it to 323, then repeat: 3234 / 343

Step 8:
The number 343 fits into 3234 9 times, leaving a remainder of 147.
The next digit of our result is 9. 
Result so far: 149849.0
The remainder is 147 after subtracting 3087 from 3234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Going ahead to step 9:
343 can be fit into 1470 4 times, resulting in a remainder of 98.
Write down 4 as next digit of the result. 
Result so far: 149849.4
If we subtract 1372 from 1470, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 10:
When dividing 980 by 343, we get 2 with a remainder of 294.
Put 2 as the next digit of the answer. 
Result so far: 149849.42
The remainder is 294 after subtracting 686 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Let's proceed to step 11:
If we divide 2940 by 343, we get 8 and a remainder of 196.
Record the quotient 8 as the next digit in the result. 
Result so far: 149849.428
If we subtract 2744 from 2940, we get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Going ahead to step 12:
343 goes into 1960 5 times with a remainder of 245.
Put 5 as the next digit of the answer. 
Result so far: 149849.4285
If we subtract 1715 from 1960, we get 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Let's proceed to step 13:
343 goes into 2450 7 times with a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 149849.42857
Subtract 2401 from 2450 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 14:
490 divided by 343 is 1 with a remainder of 147.
Write down 1 as next digit of the result. 
Result so far: 149849.428571
Deduct 343 from 490 and we're left with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Step 15:
The number 343 fits into 1470 4 times, leaving a remainder of 98.
The number 4 becomes the next digit in our result. 
Result so far: 149849.4285714
Deduct 1372 from 1470 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 16:
When dividing 980 by 343, we get 2 with a remainder of 294.
Write down 2 as next digit of the result. 
Result so far: 149849.42857142
Deduct 686 from 980 and we're left with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

After the division, we end up with 149849.42857142 and a remainder of 2.94e-07.