આપેલ ઘાતાંકીય સંખ્યાઓ માટે નીચેની ગણતરીઓ કરો:
$(i)$ $(6.7 \times 10^4) \times (8.4 \times 10^7)$
$(ii)$ $\frac{(3.4 \times 10^{-3})}{(6.5 \times 10^{-7})}$

$(i)$ $(6.7 \times 10^4) \times (8.4 \times 10^7) = (6.7 \times 8.4) \times (10^{4+7})$
$= 56.28 \times 10^{11}$
$= 5.628 \times 10^{12}$
$(ii)$ $\frac{(3.4 \times 10^{-3})}{(6.5 \times 10^{-7})} = (3.4 \div 6.5) \times (10^{-3 - (-7)})$
$= 0.5230 \times 10^4$
$= 5.230 \times 10^3$