43691000 ÷ 343 
Let's see how many times 343 fits into 43691000.

Going ahead to step 1:
343 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 343

Step 2:
43 divided by 343 is 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 43 and we're left with 43.
Fetch the next digit (6) from the dividend, attach it to 43 and continue: 436 / 343

Moving on to step 3:
If we divide 436 by 343, we get 1 and a remainder of 93.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 343 away from 436, we end up with 93.
Take the next digit (9) from the dividend and append it to 93, then repeat: 939 / 343

On to step 4:
343 can be fit into 939 2 times, resulting in a remainder of 253.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 686 from 939, we get 253.
Include the next digit (1) from the dividend after 253, then repeat: 2531 / 343

Let's proceed to step 5:
343 can be fit into 2531 7 times, resulting in a remainder of 130.
Record the quotient 7 as the next digit in the result. 
Result so far: 127.0
Subtract 2401 from 2531 to get 130.
Bring next digit (0) of the dividend behind the 130 and repeat the process: 1300 / 343

Step 6:
343 can be fit into 1300 3 times, resulting in a remainder of 271.
Use 3 as the next digit of our solution. 
Result so far: 1273.0
Subtracting 1029 from 1300 leaves us with 271.
Fetch the next digit (0) from the dividend, attach it to 271 and continue: 2710 / 343

Let's proceed to step 7:
343 can be fit into 2710 7 times, resulting in a remainder of 309.
Use 7 as the next digit of our solution. 
Result so far: 12737.0
Subtract 2401 from 2710 to get 309.
Take the next digit (0) from the dividend and append it to 309, then repeat: 3090 / 343

Let's proceed to step 8:
3090 divided by 343 is 9 with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 127379.0
Deduct 3087 from 3090 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
343 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 127379.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
343 can be fit into 300 0 times, resulting in a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 127379.0
Subtracting 0 from 300 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 127379.0, with a leftover of 0.3.