{* $height=4, $width=5 *}
{math equation="x + y" x=$height y=$width}

{* $row_height = 10, $row_width = 20, #col_div# = 2, assigned in template *}
{math equation="height * width / division"
   height=$row_height
   width=$row_width
   division=#col_div#}

{* you can use parenthesis *}
{math equation="(( x + y ) / z )" x=2 y=10 z=2}

{* you can supply a format parameter in sprintf format *}
{math equation="x + y" x=4.4444 y=5.0000 format="%.2f"}