Answer:
9.6 x 10^21
Step-by-step explanation:
First, solve 2.4 x 4, which would be 9.6,
Then, add up the exponents, which would be 10^21, since 10^14 x 10^7 = 10^21.
So, the answer is 9.6 x 10^21.
Hope this helps!
