90% of Populus euphratica in the world is in China, 90% of Populus euphratica in China is in Xinjiang, and 90% of Populus euphratica in Xinjiang is in Tarim. Populus euphratica in Tarim accounts for the number of the whole world.
全世界胡杨90%在中国，中国胡杨90%在新疆，新疆胡杨90%在塔里木．塔里木的胡杨占全世界的多少．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) * (9/10) * (9/10)</gadget>
<output>729/1_000 = around 0.729</output>

<result>729/1_000 = around 0.729</result>