Ou Zema, Koizumi, and Ou Ou all went from the black and white team base to the cinema at a certain speed. Koizumi started 10 minutes later than Ou Ou, and caught up with Ou Ou 40 minutes after departure; 40 minutes to catch up with Ou Ou. So, how many minutes does it take for Ozebra to catch up with Koizumi after setting off?
奥斑马、小泉、欧欧各以一定的速度从黑白团队基地到电影院，小泉比欧欧晚出发10分钟，出发后40分钟追上欧欧；奥斑马比小泉又晚出发20分钟，出发后1小时40分钟追上欧欧．那么，奥斑马出发后需要多少分钟才能追上小泉？
<gadget id="calculator">100 + 10 + 20</gadget>
<output>130</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">40 / 50</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">130 * (4/5)</gadget>
<output>104</output>

<gadget id="calculator">100 / 104</gadget>
<output>25/26 = around 0.961538</output>

<gadget id="calculator">(25/26) * 20</gadget>
<output>250/13 = around 19.230769</output>

<gadget id="calculator">1 - (25/26)</gadget>
<output>1/26 = around 0.038462</output>

<gadget id="calculator">(250/13) / (1/26)</gadget>
<output>500</output>

<result>500</result>