The fruit shop returns 235 kilograms of apples, which is 157 kilograms more than pears. The weight of pears is three times that of grapes. How much does the weight of grapes weigh?
水果店运回苹果235千克，比梨多157千克，梨的重量是葡萄的3倍，葡萄重多少千克？
<gadget id="calculator">235 - 157</gadget>
<output>78</output>

<gadget id="calculator">78 / 3</gadget>
<output>26</output>

<result>26</result>