If I were to theorize that this were a real interview question (which, again, it's not), then I think the first step is to ask a bunch of questions. Almost any solution to this problem will be making a bunch of assumptions, and you probably need to know what those are.

* Okay, your density is the same as it was before being shrunk. What else has changed about your body? Muscular strength? Brain capacity?

* Can you assume that this is an ideal world? For example, if the blades were perfectly balanced and there was no wind / air movement, you could stand in the middle.

* What are the dimensions?

* Is there anything in the blender?

... etc ...

The best solution would depend on which assumptions you make. Any of these could be reasonable answers with different assumptions:

* Jump (an ant or spider could... I think)

* Climb out / above the blades (it's possible the walls have grooves where you can fit your tiny little hands)

* Stand on top of the blades, at the immediate center

* Lay down

* Swim out (if there's something in the blender)

* Lay on top of a blade, clutching onto it

It's all about your assumptions.