Perform the Indicated Operation (Write Each Result in Scientific Notation $\left( 4 \times 10 ^ { - 9 } \right) \left( 6 \times 10 ^ { - 7 } \right) =$

Essay

Perform the indicated operation (write each result in scientific notation with the decimal part rounded to three significant digits when necessary). $\left( 4 \times 10 ^ { - 9 } \right) \left( 6 \times 10 ^ { - 7 } \right) =$$\underline { \quad\quad\quad\quad }$ × $\times 10$$\underline { \quad\quad\quad\quad }$