The distance from Wuhu Bus Station to Nanjing South Railway Station is about 98km. Xiao Zhang and Xiao Li drive toward each other from two stations at the same time. Xiao Zhang takes 90 minutes to complete the journey by car, and Xiao Li takes 60 minutes to complete the journey by car. How many minutes does it take for the two of them to drive to meet each other on the way?
芜湖汽车站到南京高铁南站的路程约是98km．小张和小李分别从两站同时开车相向而行，小张开车要90分钟行完全程，小李开车要60分钟行完全程．它们两人开车需要多少分钟在途中相遇？
<gadget id="calculator">1 / 90</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/90) + (1/60)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">1 / (1/36)</gadget>
<output>36</output>

<result>36</result>