A, B, and C are running a 100-meter race. When A reaches the finish line, B is still 10 meters away from the finish line, and C is still 20 meters away from the finish line. When B ran to the finish line, how many meters did C actually run?
甲、乙、丙三人进行百米赛跑，当甲到终点时，乙距终点还有10米，丙距终点还有20米．当乙跑到终点时，丙实际跑了多少米？
<gadget id="calculator">180 - 80</gadget>
<output>100</output>

<gadget id="calculator">100 / 9</gadget>
<output>100/9 = around 11.111111</output>

<gadget id="calculator">100 - (100/9)</gadget>
<output>800/9 = around 88.888889</output>

<result>800/9 = around 88.888889</result>