There are 30 apples and 20 more pears than apples. How many apples and pears are there altogether?
苹果有30只，梨比苹果多20只，苹果和梨一共有多少只．
<gadget id="calculator">30 + 20</gadget>
<output>50</output>

<gadget id="calculator">50 + 30</gadget>
<output>80</output>

<result>80</result>