During the May Day holiday, the students traveled to Wudang Mountain by car. They planned to complete the journey in 10 hours, but actually completed the whole journey (3/4) in the first 6 hours. How many hours can we arrive in advance?
五一长假，同学们乘车去武当山旅游，计划10小时行完全程，实际前6小时行了全程的(3/4)，问可以提前几小时到达？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">6 / (3/4)</gadget>
<output>8</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<result>2</result>