42291 ÷ 80 
We want to divide 42291 by 80.

Moving on to step 1:
4 divided by 80 is 0 with 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.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 80

Let's proceed to step 2:
80 goes into 42 0 times with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Fetch the next digit (2) from the dividend, attach it to 42 and continue: 422 / 80

Let's proceed to step 3:
422 divided by 80 is 5 with a remainder of 22.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 400 from 422 and we're left with 22.
Bring next digit (9) of the dividend behind the 22 and repeat the process: 229 / 80

Let's proceed to step 4:
The number 80 fits into 229 2 times, leaving a remainder of 69.
Write down 2 as next digit of the result. 
Result so far: 52.0
If we take 160 away from 229, we end up with 69.
Grab the next digit (1) from the dividend, add it to 69, then carry on: 691 / 80

Moving on to step 5:
The number 80 fits into 691 8 times, leaving a remainder of 51.
Put 8 as the next digit of the answer. 
Result so far: 528.0
If we subtract 640 from 691, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 6:
510 divided by 80 is 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 528.6
The remainder is 30 after subtracting 480 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 7:
80 can be fit into 300 3 times, resulting in a remainder of 60.
The next digit of our result is 3. 
Result so far: 528.63
Subtracting 240 from 300 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 8:
80 goes into 600 7 times with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 528.637
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
80 goes into 400 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 528.6375
Subtract 400 from 400 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
80 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 528.6375
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 528.6375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 528.6375, with a leftover of 0.0.