What is the product of 2.4 ⋅ 10^3 and 1.5 ⋅ 10^3?
3.6 ⋅ 10^6
3.9 ⋅ 10^6
3.6 ⋅ 10^9
3.9 ⋅ 10^9
3.6 ⋅ 10^6
3.9 ⋅ 10^6
3.6 ⋅ 10^9
3.9 ⋅ 10^9