Calculation: (100+99-98+97-96...+3-2+1)/5.
计算：(100+99-98+97-96…+3-2+1)/5．
<gadget id="calculator">100 + 49 + 1</gadget>
<output>150</output>

<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<result>30</result>