Xiaoying's running speed is 13.5 m/s, Xiao Ming is 1.9 m/s slower than Xiao Ying, and Xiao Hui is 1.5 m/s slower than Xiao Ming, then, what is Xiao Hui's running speed in m/s
小英的跑步速度为13.5米/秒，小明比小英慢1.9米/秒，小惠比小明慢1.5米/秒，那么，小惠的跑步速度是多少米/秒
<gadget id="calculator">13.5 - 1.9 - 1.5</gadget>
<output>10.1</output>

<result>10.1</result>