Multiply the following.

$\underline{\begin{array}{cccc}& \mathrm{H}& \mathrm{T}& \mathrm{O}\\ & 1& 0& 2\\ \times & & & 4\end{array}}$

Four multiplied by four.

$12$ times $5$ is equals.

Two sevens are _____.

One room has five fans in it. How many fans are there in four rooms$?$