There are 22 species of birch in my country, accounting for exactly (11/20) of the birch species in the world. How many species of birch are there in the world?
我国有22种桦树，正好占全世界桦树种类的(11/20)．全世界有多少种桦树？
<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

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

<result>40</result>