Calculation: 1+2+4+8+...+1024.
计算：1+2+4+8+…+1024．
<gadget id="calculator">2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 + 512 + 1_024 + 2_048</gadget>
<output>4_094</output>

<gadget id="calculator">1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 + 512 + 1_024</gadget>
<output>2_047</output>

<gadget id="calculator">4_094 - 2_047</gadget>
<output>2_047</output>

<result>2_047</result>