43809841 ÷ 405 
Our goal is to divide 43809841 by 405.

Let's proceed to step 1:
If we divide 4 by 405, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
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 / 405

Let's proceed to step 2:
43 divided by 405 is 0 with a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Append the next digit (8) from the dividend to 43 and continue with: 438 / 405

Step 3:
438 divided by 405 is 1 with a remainder of 33.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 33 after subtracting 405 from 438.
Bring next digit (0) of the dividend behind the 33 and repeat the process: 330 / 405

Let's proceed to step 4:
405 can be fit into 330 0 times, resulting in a remainder of 330.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 330, we get 330.
Grab the next digit (9) from the dividend, add it to 330, then carry on: 3309 / 405

Advancing to step 5:
405 goes into 3309 8 times with a remainder of 69.
Put 8 as the next digit of the answer. 
Result so far: 108.0
Subtract 3240 from 3309 to get 69.
Append the next digit (8) from the dividend to 69 and continue with: 698 / 405

Advancing to step 6:
If we divide 698 by 405, we get 1 and a remainder of 293.
The number 1 becomes the next digit in our result. 
Result so far: 1081.0
If we take 405 away from 698, we end up with 293.
Append the next digit (4) from the dividend to 293 and continue with: 2934 / 405

Moving on to step 7:
If we divide 2934 by 405, we get 7 and a remainder of 99.
Record the quotient 7 as the next digit in the result. 
Result so far: 10817.0
If we subtract 2835 from 2934, we get 99.
Take the next digit (1) from the dividend and append it to 99, then repeat: 991 / 405

Going ahead to step 8:
The number 405 fits into 991 2 times, leaving a remainder of 181.
Use 2 as the next digit of our solution. 
Result so far: 108172.0
Deduct 810 from 991 and we're left with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

On to step 9:
405 can be fit into 1810 4 times, resulting in a remainder of 190.
The number 4 becomes the next digit in our result. 
Result so far: 108172.4
The remainder is 190 after subtracting 1620 from 1810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 10:
1900 divided by 405 is 4 with a remainder of 280.
Use 4 as the next digit of our solution. 
Result so far: 108172.44
Subtracting 1620 from 1900 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Our division results in 108172.44 with a remaining 0.28.