The side length of a square is 50 meters. A starts from point A and walks along A→D→C→B→A. B starts from point B and walks along B→A→D→C→B. A walks 45 meters per minute. You can walk 60 meters in one minute, but you have to delay 10 seconds when passing each vertex. How long does it take for B to start? Where to catch up with armor?
正方形边长50米，甲从A点出发沿着A→D→C→B→A，乙同时从B点出发沿着B→A→D→C→B，甲每分钟走45米，乙每分钟走60米，但过每个顶点时，都要耽误10秒钟，乙出发后多少时间？在何处追上甲？
<gadget id="calculator">60 - 45</gadget>
<output>15</output>

<gadget id="calculator">50 / 45</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">50 / 15 / (10/9)</gadget>
<output>3</output>

<gadget id="calculator">10 / 3</gadget>
<output>10/3 = around 3.333333</output>

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

<gadget id="calculator">(10/3) + (1/2)</gadget>
<output>23/6 = around 3.833333</output>

<result>23/6 = around 3.833333</result>