When adding two numbers, the sum is 270. If both addends are increased by 30, what is the sum?
两数相加，和是270，如果两个加数都增加30，和是多少．
<gadget id="calculator">30 + 30</gadget>
<output>60</output>

<gadget id="calculator">270 + 60</gadget>
<output>330</output>

<result>330</result>