Calculation: (1+2+3+4+5+6+7+8+9+...+100+101+102)/2=how much.
计算：(1+2+3+4+5+6+7+8+9+…+100+101+102)/2=多少．
<gadget id="calculator">1 + 102</gadget>
<output>103</output>

<gadget id="calculator">102 / 2</gadget>
<output>51</output>

<gadget id="calculator">103 * 51</gadget>
<output>5_253</output>

<result>5_253</result>