Answer
$.84$
Work Step by Step
RECALL:
(i) Scientific notation has the form $a(10^n)$, where $1 \le a \lt 10$ and where $n$ is an integer.
(ii) $a^m \cdot a^n = a^{m+n}$
Write each factor in scientific notation to obtain:
$=7 (10^{-3}) \cdot (1.2)(10^2)$
Multiply $7$ and $1.2$ together, and the powers of 10 together to obtain:
$=8.4(10^{-3+2})
\\=8.4(10^{-1})\\\\=.84$
