Fatal error: Uncaught TypeError: Unsupported operand types: string * float in /home/1247493.cloudwaysapps.com/bfzpzmeuus/public_html/text/geometry/tank.php:54 Stack trace: #0 /home/1247493.cloudwaysapps.com/bfzpzmeuus/public_html/geometry-calculators.php(40): include() #1 /home/1247493.cloudwaysapps.com/bfzpzmeuus/public_html/solved-example.php(35): include('/home/1247493.c...') #2 {main} thrown in /home/1247493.cloudwaysapps.com/bfzpzmeuus/public_html/text/geometry/tank.php on line 54