Answer
$239,360,000\ km$
Work Step by Step
Converting units, we write ratios so that some units cancel
$\displaystyle \frac{(1.6\ a.u.)}{1}\times\frac{149,600,000\ km}{(1\ a.u.)}=(1.6)(149,600,000)\ km$
= $239,360,000\ km$
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