A car travels from A to city B. It travels the whole distance (1/4) in the first hour, and travels 80 kilometers in the second hour. At this time, it happens to travel the whole distance (3/4). How many kilometers are there between A and B?
一辆汽车从A到B城，第一小时行了全程的(1/4)，第二小时行了80千米，这时恰好行了全程的(3/4)．A、B两城相距多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">80 / (1/2)</gadget>
<output>160</output>

<result>160</result>