The distance between A and B is 400 meters. A, B, and C start from A to B at the same time, and their respective speeds remain the same. When A arrives at B, B walks 320 meters and C walks 240 meters. When B arrives at B, how many meters is C away from B?
A、B两地相距400米，甲、乙、丙三人同时从A地出发前往B地，各自的速度不变，当甲到达B地时，乙走了320米，丙走了240米，乙到达B地时，丙距B地还有多少米．
<gadget id="calculator">400 - 320</gadget>
<output>80</output>

<gadget id="calculator">320 / 240</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">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">400 - 240 - 60</gadget>
<output>100</output>

<result>100</result>