All the cement in the warehouse must be removed. All (1/2) and (1/2) tons were transported for the first time, the remaining (1/3) and (1/3) tons were transported for the second time, and the second The remaining (1/4) and (1/4) tons in the second time, the remaining (1/5) and (1/5) tons in the third time were transported away in the fourth time, and the last remaining tons were transported in the fifth time 19 tons. This warehouse originally had a total of how many tons of cement.
仓库里的水泥要全部运走．第一次运走了全部的(1/2)又(1/2)吨，第二次运走了余下的(1/3)又(1/3)吨，第三次运走了第二次余下的(1/4)又(1/4)吨，第四次运走了第三次余下的(1/5)又(1/5)吨，第五次运走了最后剩下的19吨．这个仓库原来共有水泥多少吨．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">19 + (1/5)</gadget>
<output>96/5 = around 19.2</output>

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

<gadget id="calculator">(96/5) / (4/5)</gadget>
<output>24</output>

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

<gadget id="calculator">24 + (1/4)</gadget>
<output>97/4 = around 24.25</output>

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

<gadget id="calculator">(97/4) / (3/4)</gadget>
<output>97/3 = around 32.333333</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(97/3) + (1/3)</gadget>
<output>98/3 = around 32.666667</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(98/3) / (2/3)</gadget>
<output>49</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">49 + (1/2)</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(99/2) / (1/2)</gadget>
<output>99</output>

<result>99</result>