A batch of cement was used up (1/2) by 1 ton on the first day, and the remaining (1/3) was used up by 2 tons on the second day, leaving 16 tons. How many tons is there in this batch of cement?
一批水泥，第一天用去了(1/2)多1吨，第二天用去了余下(1/3)少2吨，还剩下16吨，原来这批水泥有多少吨？
<gadget id="calculator">16 - 2</gadget>
<output>14</output>

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

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

<gadget id="calculator">14 / (2/3)</gadget>
<output>21</output>

<gadget id="calculator">21 + 1</gadget>
<output>22</output>

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

<gadget id="calculator">22 / (1/2)</gadget>
<output>44</output>

<result>44</result>