Xiao Ming's mother bought a smart phone for Xiao Ming. It is known that it takes 2 hours for the phone to be fully charged when it is plugged into the charger; if it is continuously playing games in a non-charging state, the fully charged phone can work for 6 hours , One day Xiao Ming turned on his mobile phone to play a game, and found that the phone indicated that there was only 10% of the battery left, so Xiao Ming plugged in the charger and started playing while charging. After playing for an hour, Xiao Ming turned off the mobile phone to study, and asked how much to continue charging minutes to fully charge your phone? (Standby power consumption is negligible)
小明的妈妈给小明买了一部智能手机，已知这部手机插上充电器从没有电到充满电需要2个小时；在非充电状态持续玩游戏，该充满电的手机可以工作6个小时，有一天小明打开手机准备玩游戏，发现手机提示仅剩10%的电量了，于是小明插上充电器开始一边玩一边充电，玩了1小时后，小明关上手机去学习了，问继续充电多少分钟才能将手机充满电？(待机耗电量忽略不计)
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/10) - (1/3)</gadget>
<output>17/30 = around 0.566667</output>

<gadget id="calculator">(17/30) / (1/2)</gadget>
<output>17/15 = around 1.133333</output>

<gadget id="calculator">(17/15) * 60</gadget>
<output>68</output>

<result>68</result>