ship sails from port A to port B. It travels the whole distance (1/2) on the first day, and travels the distance (2/3) on the second day. At this time, it is still 80 thousand away from port B. m, how many kilometers is the distance between port A and port B?
一艘轮船从甲港开往乙港，第一天行了全程的(1/2)，第二天行的路程是第一天的(2/3)，这时离乙港还有80千米，甲、乙两港相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/2) * (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) + (1/3)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">80 / (1/6)</gadget>
<output>480</output>

<result>480</result>