80438456 divided by 142 
Let's see how many times 142 fits into 80438456.

Advancing to step 1:
8 divided by 142 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 142

Step 2:
The number 142 fits into 80 0 times, leaving a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Fetch the next digit (4) from the dividend, attach it to 80 and continue: 804 / 142

Going ahead to step 3:
The number 142 fits into 804 5 times, leaving a remainder of 94.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 710 from 804 to get 94.
Bring next digit (3) of the dividend behind the 94 and repeat the process: 943 / 142

Step 4:
142 goes into 943 6 times with a remainder of 91.
The number 6 becomes the next digit in our result. 
Result so far: 56.0
If we take 852 away from 943, we end up with 91.
Take the next digit (8) from the dividend and append it to 91, then repeat: 918 / 142

Let's proceed to step 5:
142 can be fit into 918 6 times, resulting in a remainder of 66.
Record the quotient 6 as the next digit in the result. 
Result so far: 566.0
If we take 852 away from 918, we end up with 66.
Fetch the next digit (4) from the dividend, attach it to 66 and continue: 664 / 142

Step 6:
142 goes into 664 4 times with a remainder of 96.
Use 4 as the next digit of our solution. 
Result so far: 5664.0
The remainder is 96 after subtracting 568 from 664.
Append the next digit (5) from the dividend to 96 and continue with: 965 / 142

Let's proceed to step 7:
142 can be fit into 965 6 times, resulting in a remainder of 113.
The next digit of our result is 6. 
Result so far: 56646.0
The remainder is 113 after subtracting 852 from 965.
Take the next digit (6) from the dividend and append it to 113, then repeat: 1136 / 142

Let's proceed to step 8:
If we divide 1136 by 142, we get 8 and a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 566468.0
Subtract 1136 from 1136 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.

Advancing to step 9:
142 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 566468.0
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.

Moving on to step 10:
If we divide 0 by 142, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 566468.0
If we subtract 0 from 0, 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.

After the division, we end up with 566468.0 and a remainder of 0.0.