A construction site uses 34 tons of cement in September, of which the cement used in the second half of the month is the first half (8/9). How many tons of cement was used in the first half of the month?
一个建筑工地九月份用水泥34吨，其中下半月用的水泥是上半月的(8/9)．上半月用水泥多少吨？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1 + (8/9)</gadget>
<output>17/9 = around 1.888889</output>

<gadget id="calculator">34 / (17/9)</gadget>
<output>18</output>

<result>18</result>