We divide 815140 by 42
Let's see how many times 42 fits into 815140.

Let's proceed to step 1:
The number 42 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 42

Advancing to step 2:
If we divide 81 by 42, we get 1 and a remainder of 39.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 42 from 81 and we're left with 39.
Take the next digit (5) from the dividend and append it to 39, then repeat: 395 / 42

Let's proceed to step 3:
When dividing 395 by 42, we get 9 with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 19.0
The remainder is 17 after subtracting 378 from 395.
Bring next digit (1) of the dividend behind the 17 and repeat the process: 171 / 42

Going ahead to step 4:
42 can be fit into 171 4 times, resulting in a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 194.0
Subtract 168 from 171 to get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 42

Moving on to step 5:
42 goes into 34 0 times with a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 1940.0
Deduct 0 from 34 and we're left with 34.
Grab the next digit (0) from the dividend, add it to 34, then carry on: 340 / 42

Advancing to step 6:
340 divided by 42 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 19408.0
The remainder is 4 after subtracting 336 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
If we divide 40 by 42, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 19408.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
42 goes into 400 9 times with a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 19408.09
Subtract 378 from 400 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 9:
42 goes into 220 5 times with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 19408.095
Subtracting 210 from 220 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
100 divided by 42 is 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 19408.0952
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
The number 42 fits into 160 3 times, leaving a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 19408.09523
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
42 can be fit into 340 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 19408.095238
Deduct 336 from 340 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
When dividing 40 by 42, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 19408.095238
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
The number 42 fits into 400 9 times, leaving a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 19408.09523809
Subtracting 378 from 400 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 19408.09523809 with a remainder of 2.2e-08.