Answer
Please see the work below.
Work Step by Step
We know that
$1.437g\space CaC_2O_4\times \frac{1mol\space CaC_2O_4}{128.10g\space CaC_2O_4}\times \frac{1mol\space CaCl_2}{1mol\space CaC_2O_4}=0.0112177mol\space CaCl_2$
now $molarity=\frac{0.0112177}{0.0500L}=0.22435M$