Three people, A, B, and C, run from the same starting point to an end point 100 meters away. When A reaches the end point, B runs 80 meters, and C is still 40 meters away from the end point. When B reaches the end point, how many meters is C away from the end point? ?
甲乙丙3人同时从同一起点向100米外的终点跑去，当甲到达终点时，乙跑了80米，丙离终点还有40米，当乙到达终点时，丙离终点还有多少米？
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<gadget id="calculator">100 - 75</gadget>
<output>25</output>

<result>25</result>