Probabilities for intersections multiply like you would expect,

P(A and B) = P(A)P(B),

**if and only if A and B are independent events**.

So if you know that two events are independent, like a coin flip coming up heads and a die rolling 1, then you can find the probability of both events happening by multiplying. But events are not independent in general, and if you're given a table like this, you should look at the count in the intersection of Male and Pizza instead of multiplying probabilities. In fact, even if "Male" and "Pizza" were independent, you would get the same answer both ways and looking up a number in the table is easier than multiplying fractions, so you should do that anyway :)