Two athletes, Jingjing and Huanhuan, start from the same starting line and run in opposite directions along the circular track. Every time the two met, Huanhuan gave Jingjing an Olympic medal. Huanhuan's speed is three times faster than Jingjing's. To ensure that Jingjing gets 120 Olympic medals, how many laps does Huanhuan need to run?
两个运动员晶晶和欢欢从同一起跑线出发，沿圆形跑道向相反的方向跑去．俩人每相遇一次，欢欢就给晶晶1枚奥运纪念章．欢欢的速度是晶晶的3倍．若要保证晶晶得到120枚奥运纪念章，那么欢欢需要跑多少圈．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">120 * (3/4)</gadget>
<output>90</output>

<result>90</result>