42181771 ÷ 18 
We want to divide 42181771 by 18.

Step 1:
18 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 18

Moving on to step 2:
18 can be fit into 42 2 times, resulting in a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 36 away from 42, we end up with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 18

Step 3:
If we divide 61 by 18, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 23.0
If we take 54 away from 61, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 18

On to step 4:
The number 18 fits into 78 4 times, leaving a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 234.0
The remainder is 6 after subtracting 72 from 78.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 18

Moving on to step 5:
If we divide 61 by 18, we get 3 and a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 2343.0
The remainder is 7 after subtracting 54 from 61.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 18

On to step 6:
18 goes into 77 4 times with a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 23434.0
Subtract 72 from 77 to get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 18

Moving on to step 7:
If we divide 57 by 18, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 234343.0
If we subtract 54 from 57, we get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 18

Advancing to step 8:
The number 18 fits into 31 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 2343431.0
Subtracting 18 from 31 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 9:
When dividing 130 by 18, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 2343431.7
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
40 divided by 18 is 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 2343431.72
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
When dividing 40 by 18, we get 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2343431.722
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 2343431.722 with a remaining 0.0004.