There are 90 tons of cement in the warehouse. On the first day, (2/3) of the total amount is shipped out, and on the second day, that is equivalent to the first shipment (3/10). How many tons of cement are shipped out in the second time?
仓库里有90吨水泥，第一天运出总数的(2/3)，第二天运出的相当于第一次运出的(3/10)，第二次运出水泥多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">90 * (2/3) * (3/10)</gadget>
<output>18</output>

<result>18</result>