There is only one road from Xiaofang's house to Xiaogang's house. Xiaogang can walk the whole distance (1/20) every minute, and it takes 30 minutes for Xiaofang to walk from her home to Xiaogang's house. Now the two are walking towards each other from their respective homes at the same time, will they meet in a few minutes?
从小芳家到小刚家只有一条路．小刚每分钟可以走全程的(1/20)，小芳从自己家走到小刚家需要30分钟．现在两人同时从各自家相对而行，几分钟后能相遇？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/20) + (1/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / (1/12)</gadget>
<output>12</output>

<result>12</result>