There are 4 direct railways from A to B, and 3 direct railways from B to C, then from A to C. How many different ways are there?
从A地到B地有4条直达铁路，从B地到C地有3条直达铁路，那么从A地到C地．有多少种不同的走法？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>