A car drives from point A to point B, and it travels 75% of the way in the first 4 hours. At this speed, how many hours will it take to complete the rest of the journey? (Solution by proportional method)
一辆汽车从A地开往B地，前4小时行了全程的75%．照这样的速度，剩下的路程需要几小时才能行完？(用比例方法解)
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 / (3/4)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>