Answer
Please see the work below.
Work Step by Step
According to Charles's law
$\frac{V}{T}=constant$
we can write the above equation as
$\frac{V_f}{T_f}=\frac{V_i}{T_i}$
This can be rearranged as
$V_f=V_i\times \frac{T_f}{T_i}$
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