A train with a total length of (1/8) km passes a bridge with a length of (13/16) km. It takes 3 minutes from the front of the train to the bridge and the rear of the train to leave the bridge. How many kilometers does the train travel per minute when it crosses the bridge?
一列火车全长(1/8)km，通过一座长(13/16)km的大桥，从车头上桥到车尾离桥共用了3分钟，这列火车过桥时每分钟行多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">13 / 16</gadget>
<output>13/16 = around 0.8125</output>

<gadget id="calculator">(1/8) + (13/16)</gadget>
<output>15/16 = around 0.9375</output>

<gadget id="calculator">(15/16) / 3</gadget>
<output>5/16 = around 0.3125</output>

<result>5/16 = around 0.3125</result>