box of fruit candy, Taotao ate (2/5) on the first day, ate (1/6) and (1/5) of the existing candy on the second and third day respectively, and ate it on the third day 5 pieces. How many candies are there in this box?
一盒水果糖，淘淘第一天吃了(2/5)，第二天和第三天分别吃了当天现有糖果的(1/6)和(1/5)，第三天吃了5颗．这盒糖果原来有多少颗？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(2/5) * (1/6) * (1/5)</gadget>
<output>1/75 = around 0.013333</output>

<gadget id="calculator">(1/6) * (1/5)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(2/5) * (1/5)</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(1/75) - (1/30) - (2/25)</gadget>
<output>-1/10 = around -0.1</output>

<gadget id="calculator">(1/5) + (-1/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">5 / (1/10)</gadget>
<output>50</output>

<result>50</result>