According to 21+21=22, 22+22=23... Calculate how much 1+2+22+23+24+...+29=.
根据21+21=22，22+22=23…计算1+2+22+23+24+…+29=多少．
<gadget id="calculator">1_024 - 1</gadget>
<output>1_023</output>

<result>1_023</result>