A, B, and C run a 200-meter race (assuming their speed remains constant). When A arrives at the finish line, B is still 20 meters away, and C is still 38 meters away from the finish line, so when B reaches the finish line, how many meters is C still short?
甲、乙、丙三人进行200米赛跑(假设他们的速度保持不变)．甲到终点时，乙还差20米，丙离终点还有38米，那么乙到达终点时，丙还差多少米．
<gadget id="calculator">200 - 20</gadget>
<output>180</output>

<gadget id="calculator">200 - 38</gadget>
<output>162</output>

<gadget id="calculator">180 / 162</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">1 / (10/9)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">200 * (9/10)</gadget>
<output>180</output>

<gadget id="calculator">200 - 180</gadget>
<output>20</output>

<result>20</result>