It always Return 0 only I can't understand
<?php $emi = Mage::helper('core')->currency($this->helper('tax')->getPrice($_product, $_product->getFinalPrice()),true,false);// 5000?>
<?php $mnth = 12;
echo $emi_value = $emi/$mnth;?>
You are trying to divide a non-numeric value, and so it is returning the 0.
Try with this code instead :
<?php $emi = $this->helper('tax')->getPrice($_product, $_product->getFinalPrice()); ?>
<?php
$mnth = 12;
$emi_value = $emi/$mnth;
echo Mage::helper('core')->currency($emi_value, true, false);
?>
$emi
is numeric or not first.