When A rushes to the finish line in a 60-meter race, he is 10 meters ahead of B and 20 meters ahead of C. If B and C continue to rush to the finish line at the original speed, how much lead will B be ahead of C when they reach the finish line?
当甲在60米赛跑中冲到终点时，比乙领先10米，比丙领先20米，如果乙和丙按原来的速度继续冲向终点，那么当乙到达终点时将比丙领先多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">10 * (4/5)</gadget>
<output>8</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<result>12</result>