Try to find the result of 1*2+2*3+3*4+4*5+5*6+...+99*100.
试求1*2+2*3+3*4+4*5+5*6+…+99*100的结果．
<gadget id="calculator">99 + 1</gadget>
<output>100</output>

<gadget id="calculator">99 * 2</gadget>
<output>198</output>

<gadget id="calculator">198 + 1</gadget>
<output>199</output>

<gadget id="calculator">199 / 6</gadget>
<output>199/6 = around 33.166667</output>

<gadget id="calculator">99 * 100 * (199/6)</gadget>
<output>328_350</output>

<gadget id="calculator">328_350 + 4_950</gadget>
<output>333_300</output>

<result>333_300</result>