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Anonymous
The milli- (m) prefix means 1/1000 = 10⁻³
The Giga- (G) prefix means 10⁹
→ 1 Gm ÷ 1 mm = (1 × 10⁹)m ÷ (1 × 10⁻³)m
= 10⁹ × 10³ = 10¹²
→ There are 1,000,000,000,000 mm in 1 Gm.
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One trillion of then.