842354 divided by 80 
We want to figure out the number of times 842354 can be divided by 80.

Step 1:
8 divided by 80 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 80

Advancing to step 2:
80 goes into 84 1 times with a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 80 from 84 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 80

On to step 3:
If we divide 42 by 80, we get 0 and a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 42 and we're left with 42.
Fetch the next digit (3) from the dividend, attach it to 42 and continue: 423 / 80

Moving on to step 4:
423 divided by 80 is 5 with a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
If we take 400 away from 423, we end up with 23.
Grab the next digit (5) from the dividend, add it to 23, then carry on: 235 / 80

Step 5:
80 can be fit into 235 2 times, resulting in a remainder of 75.
Record the quotient 2 as the next digit in the result. 
Result so far: 1052.0
Subtract 160 from 235 to get 75.
Append the next digit (4) from the dividend to 75 and continue with: 754 / 80

Going ahead to step 6:
80 can be fit into 754 9 times, resulting in a remainder of 34.
The number 9 becomes the next digit in our result. 
Result so far: 10529.0
The remainder is 34 after subtracting 720 from 754.
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 7:
80 goes into 340 4 times with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 10529.4
If we take 320 away from 340, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
200 divided by 80 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 10529.42
Deduct 160 from 200 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 9:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10529.425
If we subtract 400 from 400, we 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.

Let's proceed to step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10529.425
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.

Let's proceed to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10529.425
Subtract 0 from 0 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.

The final outcome is 10529.425, with a leftover of 0.0.