3 multiplied by 3 to the negative 3?

2x3x3x3x3x3x5x7 = 17010

-3-3 is the same as -3+(-3) which is -6. Think of starting at -3 on the number line and going to the left 3 and you end up at -6.

-1 (negative 1)

1/27

-9