Deep Thought does not know the ultimate question to Life, the Universe and Everything, but offers to design an even more powerful computer, Earth, to calculate it. After ten million years of calculation, the Earth is destroyed by Vogons five minutes before the computation is complete.
(https://en.wikipedia.org/wiki/List_of_The_Hitchhiker%27s_Guide_to_the_Galaxy_characters#Deep_Thought)
Um.
So maybe we are Deep Thought 2.
And that's why youngsters are suddenly saying "6! 7!" out of the blue with apparently no meaning behind it. The question is 6 × 7 after all.