A construction site uses 18 tons of cement in the first half of September, and the cement used in the second half of September is the first half (8/9). How many tons of cement was used in September?
一个建筑工地九月份上半月用水泥18吨，下半月用的水泥是上半月的(8/9)．九月份一共用水泥多少吨？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">18 * (8/9)</gadget>
<output>16</output>

<gadget id="calculator">16 + 18</gadget>
<output>34</output>

<result>34</result>