The world-famous Silk Road is in Gansu, with a total length of 1,600 kilometers, which is 159 kilometers longer than 2.2 times the length of the Lanzhou-Xi'an railway. How many kilometers is the railway from Lanzhou to Xi'an?
世界闻名的丝绸之路在甘肃境内，总长1600千米，比兰州到西安铁路长的2.2倍还多159千米，兰州到西安的铁路长是多少千米？
<gadget id="calculator">1_600 - 159</gadget>
<output>1_441</output>

<gadget id="calculator">1_441 / 2.2</gadget>
<output>655</output>

<result>655</result>