Existing engineering waste needs to be cleared out. The first time transported away the total amount (1/2012), the second time transported away the remaining waste (2/(2012-1)), and the third time transported away the remaining (3 /(2012-3)), the remaining (4/(2012-6)) was transported for the fourth time, and the remaining (5/(2012-10)) was transported for the fifth time, ..., followed by the law, Then when transported away 50 times, the remaining waste is the total amount.
现有工程废料需要清理出去，第一次运走总量的(1/2012)，第二次运走余下废料的(2/(2012-1))，第三次运走了余下的(3/(2012-3))，第四次运走了余下的(4/(2012-6))，第五次运走了余下的(5/(2012-10))，…，依次规律下去，那么当运走50次后，余下废料是总量的多少．
<gadget id="calculator">1 + 50</gadget>
<output>51</output>

<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">51 * 25</gadget>
<output>1_275</output>

<gadget id="calculator">1_275 / 2_012</gadget>
<output>1_275/2_012 = around 0.633698</output>

<gadget id="calculator">1 - (1_275/2_012)</gadget>
<output>737/2_012 = around 0.366302</output>

<result>737/2_012 = around 0.366302</result>