My console

Fatal error: Uncaught TypeError: Unsupported operand types: string * float in /home/weerstatio/domains/weerstation-parkstad.nl/public_html/weather2/davconsole/davconvp2_v3-inc.php:126 Stack trace: #0 /home/weerstatio/domains/weerstation-parkstad.nl/public_html/weather2/davconsole/davconvp2_v3.php(135): require_once() #1 /home/weerstatio/domains/weerstation-parkstad.nl/public_html/weather2/index.php(343): include('...') #2 {main} thrown in /home/weerstatio/domains/weerstation-parkstad.nl/public_html/weather2/davconsole/davconvp2_v3-inc.php on line 126