A bunch of watermelons are sold on the first day (1/5) less than 5, the remaining (2/11) are sold on the second day by 3 more, and on the third day (1/4) less watermelons are sold 1, there are 100 watermelons left at this time, how many watermelons are there in this pile?
一堆西瓜第一天卖出总数的(1/5)少5个，第二天卖出余下的(2/11)多3个，第三天卖出此时西瓜的(1/4)少1个，这时还剩下100个西瓜，这堆西瓜原来有多少个？
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">99 / (3/4)</gadget>
<output>132</output>

<gadget id="calculator">132 + 3</gadget>
<output>135</output>

<gadget id="calculator">2 / 11</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">1 - (2/11)</gadget>
<output>9/11 = around 0.818182</output>

<gadget id="calculator">135 / (9/11)</gadget>
<output>165</output>

<gadget id="calculator">165 - 5</gadget>
<output>160</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">160 / (4/5)</gadget>
<output>200</output>

<result>200</result>