We're dividing 42164434 by 405 
We want to divide 42164434 by 405.

Going ahead to step 1:
If we divide 4 by 405, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 405

On to step 2:
When dividing 42 by 405, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 405

Going ahead to step 3:
When dividing 421 by 405, we get 1 with a remainder of 16.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 405 from 421 to get 16.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 405

On to step 4:
The number 405 fits into 166 0 times, leaving a remainder of 166.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 166, we get 166.
Grab the next digit (4) from the dividend, add it to 166, then carry on: 1664 / 405

Let's proceed to step 5:
405 goes into 1664 4 times with a remainder of 44.
Write down 4 as next digit of the result. 
Result so far: 104.0
Deduct 1620 from 1664 and we're left with 44.
Fetch the next digit (4) from the dividend, attach it to 44 and continue: 444 / 405

Step 6:
405 can be fit into 444 1 times, resulting in a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 1041.0
Deduct 405 from 444 and we're left with 39.
Take the next digit (3) from the dividend and append it to 39, then repeat: 393 / 405

Let's proceed to step 7:
405 goes into 393 0 times with a remainder of 393.
Put 0 as the next digit of the answer. 
Result so far: 10410.0
Subtracting 0 from 393 leaves us with 393.
Take the next digit (4) from the dividend and append it to 393, then repeat: 3934 / 405

On to step 8:
405 goes into 3934 9 times with a remainder of 289.
Write down 9 as next digit of the result. 
Result so far: 104109.0
Deduct 3645 from 3934 and we're left with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Step 9:
405 goes into 2890 7 times with a remainder of 55.
The number 7 becomes the next digit in our result. 
Result so far: 104109.7
Subtracting 2835 from 2890 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 10:
405 goes into 550 1 times with a remainder of 145.
Write down 1 as next digit of the result. 
Result so far: 104109.71
If we take 405 away from 550, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 11:
405 can be fit into 1450 3 times, resulting in a remainder of 235.
Put 3 as the next digit of the answer. 
Result so far: 104109.713
If we take 1215 away from 1450, we end up with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Advancing to step 12:
If we divide 2350 by 405, we get 5 and a remainder of 325.
The next digit of our result is 5. 
Result so far: 104109.7135
If we take 2025 away from 2350, we end up with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Let's proceed to step 13:
When dividing 3250 by 405, we get 8 with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 104109.71358
Subtract 3240 from 3250 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
The number 405 fits into 100 0 times, leaving a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 104109.71358
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 15:
405 can be fit into 1000 2 times, resulting in a remainder of 190.
Write down 2 as next digit of the result. 
Result so far: 104109.7135802
Subtract 810 from 1000 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 16:
1900 divided by 405 is 4 with a remainder of 280.
The number 4 becomes the next digit in our result. 
Result so far: 104109.71358024
The remainder is 280 after subtracting 1620 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The quotient of the division is 104109.71358024, and the remainder is 2.8e-07.