2.7km2

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keannu

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Do you read this as "two point seven square kilometer" or "~kilometers"? Singular or plural? What about cubic meter or meters?

ma78),,,The Surtsey eruption continued for a little more than three and a half years. When they stopped, the island had grown to a size of 2.7km[SUP]2[/SUP]
 
Two point seven square kilometres. (BrE)
 
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