One line segment is 5 cm long and the other line segment is 3 times the length of this line segment. What is the length of the other line segment in cm?
一条线段长5厘米，另一条线段是这条线段的3倍，另一条线段长是多少厘米．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>