A speedboat travels 60 kilometers per hour, and an ordinary motorized cruise ship travels 40 kilometers per hour. Both ships depart from Li'an Port to a designated sea area 240 kilometers away from Li'an Port for investigation. How much time do you save by taking a speedboat compared to a regular motor cruise?
一艘快艇每小时行驶60千米，一艘普通机动游船每小时行驶40千米，两船同时从黎安港出发开往离黎安港240千米的指定海域进行考察作业．坐快艇比普通机动游船节省多少时间？
<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<result>20</result>