A car plans to drive from point A to point B in 2 hours. When there are 160 kilometers left, the car breaks down and the speed is 20% slower than the original. As a result, it arrives 20 minutes later than the original plan. How long is AB?
一辆汽车计划用2小时从A地开往B地，当还剩160千米时，汽车出现小故障，速度比原来慢20%，结果比原计划推迟20分钟到达，AB长多少千米？
<gadget id="calculator">20 / 60</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) / (1/4)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">160 / (4/3)</gadget>
<output>120</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<result>240</result>