Tibet Tianlu Company built a section of road, and built 15 kilometers in the first three months. Based on this speed, the task was just completed in one year. How many kilometers is this road?
西藏天路公司修一段公路，前3个月修了15千米，照这样的速度计算，一年刚好完成任务．这段公路长多少千米？
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<result>60</result>