If there are two different paths from A to B, and 4 different paths from B to C, then how many different paths are there from A to C via B?
从甲地到乙地有两条不同的路可走，从乙地到丙地有4条不同的路可走，则从甲地经乙地去丙地有多少条不同的路可走．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>