A computer is infected with a virus. In the computer's memory, every number x from 2 to 9 is replaced by the sum of 1+2+3+...+x. For example, 2 is replaced by 3,3=1+2), and 5 is replaced by 15,15=1+2+3+4+5). Other functions of the computer are normal. If you want to calculate 1+3+5, the computer will display the result.
一台计算机感染了病毒．在计算机的存贮器中，从2到9的每一个数x被1+2+3+…+x的和代替．例如2被3,3=1+2)代替，5被15,15=1+2+3+4+5)代替．计算机的其他性能都正常．你若要计算1+3+5，计算机会显示的结果是多少．
<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">1 + 2 + 3 + 4 + 5</gadget>
<output>15</output>

<gadget id="calculator">1 + 6 + 15</gadget>
<output>22</output>

<result>22</result>