The output of apples is twice that of pears. It is known that there are 120 tons of apples and pears. How many tons are there in pears?
苹果的产量是梨的2倍，已知苹果和梨共有120吨，梨有多少吨？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<result>40</result>