How do I multiply fractions with large numbers?

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jemjabella42
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How do I take (2/3) x (3 x 10^8)?
 
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You could express 2/3 as 0.66666667 and multiply by 3 x 10^8.
You could cancel the 3's to get 2 x 10^8
You could multiply the numerators 2 x 3 x 10^8, then divide by the denominator 3.