Some people use carts to transport rice from A to B. A heavy truck with rice travels 50 kilometers a day, an empty truck travels 70 kilometers a day, and goes back and forth three times in 5 days. How many kilometers are there between A and B?
有人用车把米从甲地运往乙地，装米的重车日行50千米，空车日行70千米，5日往返三次．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>