There are 40 species of birches in the world, and the types of birches in my country account for (11/20). How many species of birches are there in my country?
全世界有桦数40种，我国的桦树的种类占其中的(11/20)，我国有多少种桦树？
<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">40 * (11/20)</gadget>
<output>22</output>

<result>22</result>