A motorcycle has traveled the entire distance (4/7) from place A to place B, and it is still 42 kilometers away from place B. How many kilometers are there between A and B?
一辆摩托车从甲地开往乙地，已行了全程的(4/7)，离乙地还有42千米．甲、乙两地相距多少千米？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">42 / (3/7)</gadget>
<output>98</output>

<result>98</result>