Between AB and AB, it takes 12 hours for car A to complete the journey, and 20 hours for car B to complete the journey. Car A travels from point A to point B. After 2 hours of departure, car B starts from point B to point A. When they meet, A’s total How many hours did you do it?
AB两地，甲车行完全程要12小时，乙车行完全程20小时，甲车从A地去B地，出发2小时后，乙车从B地出发去A地，相遇时，甲一共行了多少小时？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 2</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/12) + (1/20)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(5/6) / (2/15)</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">(25/4) + 2</gadget>
<output>33/4 = around 8.25</output>

<result>33/4 = around 8.25</result>