$0.3 \times 0.4 =___$

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Solution

When we remove a decimal from a given number then the same number of zeros is added to the denominator
$= 0.3 \times 0.4 = \frac{3}{10} \times \frac{4}{10} = \frac{12}{100} = 0.12$
Hence, $0.3 \times 0.4 = 0.12$

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