Xiaoming’s mobile phone is always on and playing games for 5 minutes and loses 3% of the battery, and uses a power bank to charge 2% in 3 minutes. How long can Xiaoming charge while playing games?
小明手机常亮玩游戏5分钟掉3%的电量，用充电宝3分钟充2%，请问小明一边玩游戏一边充电多久可以充满？
<gadget id="calculator">1_500 / 60</gadget>
<output>25</output>

<result>25</result>