43519816 ÷ 91 
We want to divide 43519816 by 91.

Going ahead to step 1:
The number 91 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 91

On to step 2:
When dividing 43 by 91, we get 0 with a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 91

Moving on to step 3:
The number 91 fits into 435 4 times, leaving a remainder of 71.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 71 after subtracting 364 from 435.
Grab the next digit (1) from the dividend, add it to 71, then carry on: 711 / 91

Advancing to step 4:
91 goes into 711 7 times with a remainder of 74.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
Subtract 637 from 711 to get 74.
Fetch the next digit (9) from the dividend, attach it to 74 and continue: 749 / 91

Going ahead to step 5:
The number 91 fits into 749 8 times, leaving a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 478.0
If we subtract 728 from 749, we get 21.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 91

Going ahead to step 6:
91 can be fit into 218 2 times, resulting in a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 4782.0
If we take 182 away from 218, we end up with 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 91

Going ahead to step 7:
361 divided by 91 is 3 with a remainder of 88.
Use 3 as the next digit of our solution. 
Result so far: 47823.0
If we take 273 away from 361, we end up with 88.
Grab the next digit (6) from the dividend, add it to 88, then carry on: 886 / 91

Going ahead to step 8:
If we divide 886 by 91, we get 9 and a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 478239.0
If we subtract 819 from 886, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 9:
91 goes into 670 7 times with a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 478239.7
Subtracting 637 from 670 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 10:
If we divide 330 by 91, we get 3 and a remainder of 57.
The next digit of our result is 3. 
Result so far: 478239.73
Subtracting 273 from 330 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 11:
If we divide 570 by 91, we get 6 and a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 478239.736
If we subtract 546 from 570, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 12:
When dividing 240 by 91, we get 2 with a remainder of 58.
Record the quotient 2 as the next digit in the result. 
Result so far: 478239.7362
Subtract 182 from 240 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 13:
When dividing 580 by 91, we get 6 with a remainder of 34.
The next digit of our result is 6. 
Result so far: 478239.73626
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 14:
If we divide 340 by 91, we get 3 and a remainder of 67.
The number 3 becomes the next digit in our result. 
Result so far: 478239.736263
If we subtract 273 from 340, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 15:
The number 91 fits into 670 7 times, leaving a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 478239.7362637
If we subtract 637 from 670, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 16:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 478239.73626373
If we take 273 away from 330, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

In conclusion, the division gives 478239.73626373 with a balance of 5.7e-08.