Cars A and B are traveling towards each other from two places, and meet at a distance of 50 kilometers from the midpoint. When they meet, car A has driven 1/4 of the entire distance. How many kilometers are there between the two places?
甲、乙两车分别从两地相向而行，在距中点50千米处相遇，相遇时甲车行了全程的(1/4)，求两地相距多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">50 / (1/4)</gadget>
<output>200</output>

<result>200</result>