From school to the city library, it takes Xiao Ming 2 hours by bike, and Xiao Jun 3 hours by bike. If Xiao Jun walks 0.5 hours earlier than Xiao Ming, how many hours will it take for Xiao Ming to catch up with Xiao Jun?
从学校到市图书馆，小明骑车要走2小时，小军骑车要走3小时，如果小军比小明早走0.5小时，小明追上小军要多少小时？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">0.5 / (1/6)</gadget>
<output>3</output>

<gadget id="calculator">(1/3) * 3</gadget>
<output>1</output>

<result>1</result>