Simplify: (i) 2×103 (ii) 72×22 (iii) 23×5 (iv) 0×102

Simplify: $(i) 2 \times 10^{3} (ii) 7^{2} \times 2^{2} (iii) 2^{3} \times 5 (iv) 0 \times 10^{2}$

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