The passenger car and the truck travel towards each other from two places at the same time. When the truck travels 65% of the journey, the bus travels 70% of the journey. At this time, the distance between the two cars is 42 kilometers. How many kilometers are the distance between the two places?
客车和货车同时从两地相向而行，当货车行了全程的65%时，客车行了全程的70%．此时，两车相距42千米．两地相距多少千米？
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) - 1</gadget>
<output>-3/10 = around -0.3</output>

<gadget id="calculator">(13/20) + (-3/10)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">42 / (7/20)</gadget>
<output>120</output>

<result>120</result>