2+4-6+8+10-12+14+16-18+...+1202+1204-1206+1208+1210-1212.
2+4-6+8+10-12+14+16-18+…+1202+1204-1206+1208+1210-1212．
<gadget id="calculator">2 + 1_212</gadget>
<output>1_214</output>

<gadget id="calculator">1_212 / 2 / 2</gadget>
<output>303</output>

<gadget id="calculator">1_214 * 303</gadget>
<output>367_842</output>

<gadget id="calculator">6 + 1_212</gadget>
<output>1_218</output>

<gadget id="calculator">1_212 - 6</gadget>
<output>1_206</output>

<gadget id="calculator">1_206 / 6</gadget>
<output>201</output>

<gadget id="calculator">201 + 1</gadget>
<output>202</output>

<gadget id="calculator">202 / 2</gadget>
<output>101</output>

<gadget id="calculator">2 * 1_218 * 101</gadget>
<output>246_036</output>

<gadget id="calculator">367_842 - 246_036</gadget>
<output>121_806</output>

<result>121_806</result>