The train is 108 meters long and travels 12 meters per second. How long does it take to pass a 48-meter bridge?
火车长108米，每秒行12米，经过长48米的桥，要多少时间？
<gadget id="calculator">108 + 48</gadget>
<output>156</output>

<gadget id="calculator">156 / 12</gadget>
<output>13</output>

<result>13</result>