A train has a total length of (1/8) kilometers and passes a bridge (13/16) kilometers long. It takes (1/12) hours from the front of the train to the bridge to the end of the bridge. How many kilometers per hour?
一列火车全长(1/8)千米，通过一座长(13/16)千米的大桥，从车头上桥到车尾离桥共用了(1/12)小时，这列火车过桥时每小时行多少千米？
<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">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(15/16) / (1/12)</gadget>
<output>45/4 = around 11.25</output>

<result>45/4 = around 11.25</result>