A train from Nanchong to Chengdu traveled 30% of the whole journey from 8:00 am to 9:00 am, traveled 3/5 of the whole journey from 9:00 am to 11:00 am, and completed the remaining distance of 22 kilometers by 11:30 am , Seek the length of the railway from Nanchong to Chengdu.
一列火车从南充开往成都，上午八点到九点行了全程的30%，九点到十一点行了全程的(3/5)，到十一点半行完余下的路程22千米，求南充到成都的铁路长．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/10) + (3/5)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">22 / (1/10)</gadget>
<output>220</output>

<result>220</result>