Answer
$8.2\times10^{7}$
Work Step by Step
$$(2\times10^{4})(4.1\times10^{3})$$
Regroup like terms, then simplify:
$$=(2\times4.1)(10^{4}\times10^{3})$$
$$=8.2\times10^{(4+3)}$$
$$=8.2\times10^{7}$$
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