Queries :: Multiplying Two Values From Same Column

Names Number1 Number2
Name1 1 2
Name1 2 1
Name1 3 -2
Name1 4 2
Name1 5 5
Name2 1 2
Name2 2 5
Name2 3 2
Name2 4 5
Name2 5 -1
...

For each Name, Number1 will always contain the values from 1 to 5. Number2 can vary, however.

I need constructing a query that, for each name, will look at the values in the Number2 column when Number1 is 1 or 2 and multiply them. So, the result I'm looking for is:

Name1 2
Name2 10

(Since 2 = 2 x 1 and 10 = 2 x 5)

I haven't had much look Googling (most search results involve multiplying two columns together, which isn't exactly what I'm after).