816589 ÷ 42 
We're looking to find how many times 42 goes into 816589.

On to step 1:
The number 42 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 42

On to step 2:
42 goes into 81 1 times with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 42 away from 81, we end up with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 42

Let's proceed to step 3:
396 divided by 42 is 9 with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we subtract 378 from 396, we get 18.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 42

Moving on to step 4:
185 divided by 42 is 4 with a remainder of 17.
The next digit of our result is 4. 
Result so far: 194.0
Subtracting 168 from 185 leaves us with 17.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 42

Going ahead to step 5:
If we divide 178 by 42, we get 4 and a remainder of 10.
The next digit of our result is 4. 
Result so far: 1944.0
Subtract 168 from 178 to get 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 42

Let's proceed to step 6:
42 can be fit into 109 2 times, resulting in a remainder of 25.
The number 2 becomes the next digit in our result. 
Result so far: 19442.0
Deduct 84 from 109 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 7:
42 goes into 250 5 times with a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 19442.5
Deduct 210 from 250 and we're left 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.

Let's proceed to step 8:
400 divided by 42 is 9 with a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 19442.59
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.

Going ahead to step 9:
42 goes into 220 5 times with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 19442.595
If we subtract 210 from 220, we 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.

Step 10:
42 can be fit into 100 2 times, resulting in a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 19442.5952
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
If we divide 160 by 42, we get 3 and a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 19442.59523
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.

Going ahead to step 12:
42 can be fit into 340 8 times, resulting in a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 19442.595238
If we take 336 away from 340, we end up 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:
42 goes into 40 0 times with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 19442.595238
Deduct 0 from 40 and we're left 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.

On to step 14:
If we divide 400 by 42, we get 9 and a remainder of 22.
The next digit of our result is 9. 
Result so far: 19442.59523809
If we subtract 378 from 400, we 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.

In conclusion, the division gives 19442.59523809 with a balance of 2.2e-08.