(1/2)+(3/(2**2))+(5/(2**3))+(7/(2**4))+…+(199/(2**0) ).
(1/2)+(3/(2**2))+(5/(2**3))+(7/(2**4))+…+(199/(2**0))．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">2 ** 0</gadget>
<output>1</output>

<gadget id="calculator">203 / 1</gadget>
<output>203</output>

<gadget id="calculator">3 - 203</gadget>
<output>-200</output>

<result>-200</result>