There are two kinds of fruits, pears and apples, in the store. The mass of pears is heavier than apples (1/5), and the mass of apples is 20kg lighter than pears. How many kilograms of pears are there in the store?
商店有梨和苹果两种水果，梨的质量比苹果重(1/5)，苹果的质量比梨轻20kg，商店有梨多少kg？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 / (1/5)</gadget>
<output>100</output>

<gadget id="calculator">20 + 100</gadget>
<output>120</output>

<result>120</result>