Answer
$4 \times 10^6$
Work Step by Step
$\dfrac{a^m}{a^n}=a^{m-n}, a\ne0$
Divide the corresponding parts while using the rule above to obtain:
$=\dfrac{5.2}{1.3} \times \dfrac{10^{13}}{10^7}
\\=4 \times 10^{13-7}
\\=4 \times 10^6$
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