There are 4 routes from Kobayashi's house to the art museum, and 2 routes from the art museum to the Science Museum. So how many ways are there from Xiaolin's house to the art museum and then to the Science Museum?
小林家到美术馆有4条路可以走，从美术馆到科学馆有2条路可以走，那么从小林家到美术馆再到科学馆，共有几种走法？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>