On February 10, 2004, American scientists manipulated the "Opportunity" rover to dig a 50cm-long trench on the surface of Mars in 22 minutes, with an average of how many centimeters per minute
2004年2月10日，美国科学家操纵"机遇"号火星车，在火星表面上用22分钟挖了一条长50cm的沟，平均每分钟挖多少cm
<gadget id="calculator">50 / 22</gadget>
<output>25/11 = around 2.272727</output>

<result>25/11 = around 2.272727</result>