There are 136 kilograms of apples in the fruit shop, which is twice the weight of pears, and the weight of bananas is 20 kilograms more than three times that of pears. How many kilograms are there in pears?
水果店有苹果136千克，是梨的重量的2倍，而香蕉的重量比梨的3倍还多20千克，梨有多少千克？
<gadget id="calculator">136 / 2</gadget>
<output>68</output>

<result>68</result>