The computer takes 12.19512.... nanoseconds to perform one calculation.
Step-by-step explanation
The computer performs 8.2× 10⁷ calculations per second.
We know that, 1 second = 10⁹ nanoseconds.
Suppose, the computer takes
nanoseconds to perform one calculation.
So, the time taken to perform 8.2× 10⁷ calculations
nanoseconds.
Thus the equation will be............

So, the computer takes 12.19512.... nanoseconds to perform one calculation.