Question

$3 \: \times \: 5 \: \frac{1}{5} \: = \: ?$
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Answer 1

$5 \: \frac{1}{5} = \frac{26}{5} \\ \\ so \\ \\ 3 \times \frac{26}{5} = \frac{78}{5} = 15 \: \frac{3}{5}$

Answer 2

The origin of the universe lies in the basics of Big Bang theory. According to this theory, about 1380 crore (13.8 billion) years ago, all matter and energy in the universe were focused into a zone smaller than an atom.