Anybody know how too do this?

  2.4×10^6

Step-by-step explanation:

Your scientific or graphing calculator can do the math. It can even express the result in scientific notation.* Since the two numbers each have 2 significant digits, the result should be expressed to 2 significant digits.

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* "Standard form" is the form of the numbers in the problem statement if you're not in the US. In the US, "standard form" is the form shown in the calculator result, below. That number would be 2,400,000 if written to the appropriate degree of accuracy.