In a big bowl, mix together the dry cake mix with the crushed pineapple and its juice. Start beating the mixture on low speed for half a minute, then increase to medium speed and continue beating for 1 minute. Transfer the mixture to an unfloured 10-inch tube pan.
Place the pan in the oven and bake until it has a rich golden-brown hue, 40 to 45 minutes. After removing the pan from the oven, flip it upside down and let it cool completely, around 2 hours.
Once the cake has cooled, use a knife to loosen the edges and invert it onto a serving plate. To serve, slice the cake with a serrated knife.