We divide 16447721 by 405
We want to divide 16447721 by 405.

Step 1:
405 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 405

On to step 2:
If we divide 16 by 405, we get 0 and a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 405

Advancing to step 3:
When dividing 164 by 405, we get 0 with a remainder of 164.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 164 to get 164.
Grab the next digit (4) from the dividend, add it to 164, then carry on: 1644 / 405

Moving on to step 4:
When dividing 1644 by 405, we get 4 with a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 1620 away from 1644, we end up with 24.
Grab the next digit (7) from the dividend, add it to 24, then carry on: 247 / 405

Moving on to step 5:
247 divided by 405 is 0 with a remainder of 247.
The next digit of our result is 0. 
Result so far: 40.0
The remainder is 247 after subtracting 0 from 247.
Fetch the next digit (7) from the dividend, attach it to 247 and continue: 2477 / 405

Advancing to step 6:
405 can be fit into 2477 6 times, resulting in a remainder of 47.
Put 6 as the next digit of the answer. 
Result so far: 406.0
Deduct 2430 from 2477 and we're left with 47.
Bring next digit (2) of the dividend behind the 47 and repeat the process: 472 / 405

Moving on to step 7:
If we divide 472 by 405, we get 1 and a remainder of 67.
The number 1 becomes the next digit in our result. 
Result so far: 4061.0
If we subtract 405 from 472, we get 67.
Include the next digit (1) from the dividend after 67, then repeat: 671 / 405

On to step 8:
If we divide 671 by 405, we get 1 and a remainder of 266.
Use 1 as the next digit of our solution. 
Result so far: 40611.0
Deduct 405 from 671 and we're left with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Advancing to step 9:
If we divide 2660 by 405, we get 6 and a remainder of 230.
Put 6 as the next digit of the answer. 
Result so far: 40611.6
The remainder is 230 after subtracting 2430 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 10:
405 can be fit into 2300 5 times, resulting in a remainder of 275.
Write down 5 as next digit of the result. 
Result so far: 40611.65
Subtracting 2025 from 2300 leaves us with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 11:
405 can be fit into 2750 6 times, resulting in a remainder of 320.
Put 6 as the next digit of the answer. 
Result so far: 40611.656
Subtract 2430 from 2750 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 12:
If we divide 3200 by 405, we get 7 and a remainder of 365.
Put 7 as the next digit of the answer. 
Result so far: 40611.6567
The remainder is 365 after subtracting 2835 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Going ahead to step 13:
405 goes into 3650 9 times with a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 40611.65679
Subtracting 3645 from 3650 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
405 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 40611.65679
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 15:
The number 405 fits into 500 1 times, leaving a remainder of 95.
The next digit of our result is 1. 
Result so far: 40611.6567901
Subtract 405 from 500 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Advancing to step 16:
405 goes into 950 2 times with a remainder of 140.
Use 2 as the next digit of our solution. 
Result so far: 40611.65679012
Subtracting 810 from 950 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Our division results in 40611.65679012 with a remaining 1.4e-07.