A ship sails from port A to port B, and travels the whole journey (3/10) in 8 hours. How many more hours can it reach port B?
一只轮船从甲港开往乙港，8小时行了全程的(3/10)，再行多少小时可以到达乙港．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">8 / (3/10)</gadget>
<output>80/3 = around 26.666667</output>

<gadget id="calculator">(80/3) - 8</gadget>
<output>56/3 = around 18.666667</output>

<result>56/3 = around 18.666667</result>