Xiaogang and Xiaoyong ran a 50-meter race. As a result, when Xiaogang reached the finish line, Xiaoyong was still 10 meters behind Xiaogang; in the second race, Xiaogang's starting line retreated 10 meters, and the two still followed the first time. Speed running, the result of the race will be how many meters behind Xiaoyong when Xiaogang reaches the finish line
小刚与小勇进行50米赛跑，结果，当小刚到达终点时，小勇还落后小刚10米；第二次赛跑，小刚的起跑线退后10米，两人仍按第一次的速度跑，比赛结果将是小刚到达终点时，小勇落后多少米
<gadget id="calculator">50 + 10</gadget>
<output>60</output>

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

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<gadget id="calculator">50 - 48</gadget>
<output>2</output>

<result>2</result>