For a batch of cement, 18 tons are used, and the rest is used (5/9). How many tons are there in this batch of cement?
一批水泥，用去18吨，剩下的是用去的(5/9)，这批水泥有多少吨？
<gadget id="calculator">9 + 5</gadget>
<output>14</output>

<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<gadget id="calculator">18 / (9/14)</gadget>
<output>28</output>

<result>28</result>