A, B, and C are running a 100-meter race. When A reaches the finish line, B is 20 meters away from the finish line, and C is 40 meters away from the finish line. When B reaches the finish line, how many meters does C still have to reach the finish line?
甲、乙、丙三人进行100米赛跑，甲到终点时，乙还差20米到终点，丙离终点还有40米．乙到终点时，丙还有多少米才能到终点？
<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<gadget id="calculator">80 / 60</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 / (4/3)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">100 * (3/4)</gadget>
<output>75</output>

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

<result>25</result>