Two cars AB leave opposite directions at the same time from places A and B, and meet each other in 5 hours. Continue to walk for 3 hours after meeting, when A is still 1/4 of the way from B, B is still 60 kilometers away from A. Seek the whole process.
AB两车同时从甲乙两地相向开出，5小时相遇．相遇后继续走3小时，当A离乙地还有全程的(1/4)时，B距离甲地还有60公里．求全程．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 3</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 / (3/20)</gadget>
<output>400</output>

<result>400</result>