There are 30 cartons of pears in the fruit shop, twice the number of cartons of apples, and 5 more cartons of oranges than apples. How many cartons of oranges are there?
水果店里有30箱梨，是苹果箱数的2倍，橘子的箱数比苹果多5箱，橘子有多少箱？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<result>20</result>