1+1(1/3)+1(2/3)+2+2(1/3)+2(2/3)+3+3(1/3)+3(2/3)+…+ 28+28(1/3)+28(2/3).
1+1(1/3)+1(2/3)+2+2(1/3)+2(2/3)+3+3(1/3)+3(2/3)+…+28+28(1/3)+28(2/3)．
<gadget id="calculator">1 + 28</gadget>
<output>29</output>

<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">29 * 14 * 3</gadget>
<output>1_218</output>

<gadget id="calculator">1_218 + 28</gadget>
<output>1_246</output>

<result>1_246</result>