When Archie's family travels, they can take a train, a car, or an airplane. After searching online, there were 4 trains, 3 cars, and 2 planes on the day of departure. How many different options do they have for taking these means of transportation?
阿奇一家人外出旅游，可以乘火车，也可以乘汽车，还可以坐飞机．经过网上查询，出发的那一天中火车有4班，汽车有3班，飞机有2班．他们乘坐这些交通工具，一共可以有多少种不同的选择？
<gadget id="calculator">4 + 3 + 2</gadget>
<output>9</output>

<result>9</result>