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  1. or download this
    $uptime=`cat /proc/uptime`;
    print ref(\$uptime)," $uptime\n";
    $uptime*=1;
    print ref(\$uptime)," $uptime\n";
    
  2. or download this
    SCALAR 12844.72 24452.05
    
    SCALAR 12844.72
    
  3. or download this
    $uptime=`cat /proc/uptime`;
    print ref(\$uptime)," $uptime\n";
    $uptime*=2;
    print ref(\$uptime)," $uptime\n";
    
  4. or download this
    SCALAR 12956.65 24667.72
    
    SCALAR 25913.3