You have to evaluate the RAM in MB.
Question: Calculate the random access memory (RAM) in megabytes necessary to store a multidimensional array that is 20 × 40 × 120.
This array is double precision, and each value requires a 64-bit word.
Recall that a 64-bit word = 8 bytes and 1 kilobyte = 210 bytes.
Suppose that the index starts at 1. The conversion seems too simple. Thanks