There is a triangular field with a base of 300 meters and a height of 250 meters. Two tractors A and B plow this field at the same time. A plows 1.2 hectares per hour, and B plows 1.3 hectares per hour. How many hours will it take to finish plowing this field?
有一块三角形田块，底是300米，高250米．甲、乙两台拖拉机同时合耕这块地，甲每小时耕1.2公顷，乙每小时耕1.3公顷，耕完这块田需要多少小时？
<gadget id="calculator">1.2 + 1.3</gadget>
<output>2.5</output>

<gadget id="calculator">3.75 / 2.5</gadget>
<output>1.5</output>

<result>1.5</result>