Before the fifth speed increase, it took 16 hours for the train to go from Hangzhou to Beijing. After the fifth speed increase of 20%, how many hours will it take from Hangzhou to Beijing?
第五次火车提速前，火车从杭州到北京要16小时，第五次提速20%后，从杭州到北京需多少小时．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">16 / (6/5)</gadget>
<output>40/3 = around 13.333333</output>

<result>40/3 = around 13.333333</result>