Xiaohong and Xiaoming are running a 100-meter race. When Xiaohong runs 60 meters, Xiaoming runs exactly 50 meters. If Xiaohong's speed remains the same, and Xiaoming wants to win the championship, how much will his speed increase in the future?
小红、小明进行100米赛跑，当小红跑60米时，小明正好跑50米，如果小红速度不变，小明想要获得冠军，以后速度至少提高多少．
<gadget id="calculator">20 / 3</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">50 / (20/3)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) - 5</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) / 5</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>