Two cars, A and B, leave opposite places A and B at the same time, and meet each other in 5 hours. It is known that the ratio of the speeds of A and B is 2:3. How many hours does it take for A to complete the journey?
甲、乙两车同时从A、B两地相对开出，5小时相遇，已知甲、乙两车速度的比是2：3，甲车行完全程需多少小时？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/5) * (2/5)</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">1 / (2/25)</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>