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<?php class Math { protected static $pi = 3.14; } class CircleMath extends Math { public static function calculateArea($radio) { return self::$pi * pow($radio, 2); } } $radio = 5; echo sprintf('El área del circulo con radio de longitud %s es: %s', $radio, CircleMath::calculateArea($radio)); ?>
Output for git.master, git.master_jit, rfc.property-hooks
El área del circulo con radio de longitud 5 es: 78.5

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