An empty truck without cargo can travel 70 kilometers a day, but a full truck can only travel 50 kilometers a day. Now transport goods from A to B, and then return empty, 5 days can go back and forth 3 times. How many kilometers are there between A and B?
没有运送货物的空车一天行驶70千米，装满货物后一天只能行驶50千米．现在从甲地运货到乙地，然后再空车返回，5天可以往返3次．甲乙两地相距多少千米．
<gadget id="calculator">35 / 12</gadget>
<output>35/12 = around 2.916667</output>

<gadget id="calculator">50 * (35/12)</gadget>
<output>875/6 = around 145.833333</output>

<gadget id="calculator">25 / 12</gadget>
<output>25/12 = around 2.083333</output>

<gadget id="calculator">70 * (25/12)</gadget>
<output>875/6 = around 145.833333</output>

<gadget id="calculator">(875/6) + (875/6)</gadget>
<output>875/3 = around 291.666667</output>

<gadget id="calculator">(875/3) / 6</gadget>
<output>875/18 = around 48.611111</output>

<result>875/18 = around 48.611111</result>