At 7 a.m. on May 1st, the students drove from the school to Qixing Lake to play, and drove the whole distance (3/4) in 0.6 hours. At this time, they were still 4 kilometers away from Qixing Lake. At this speed, how many hours will it take to complete the journey?
5月1日上午7时，同学们乘车从学校出发到七星湖玩，0.6小时行驶了全程的(3/4)，这时距七星湖边还有4千米．照这样的速度，行完全程共用多少小时？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 0.6</gadget>
<output>1.25</output>

<gadget id="calculator">1 / 1.25</gadget>
<output>0.8</output>

<result>0.8</result>