The two hectares of corn planted by the farmer's uncle had a good harvest, with an average harvest of 9,000 grams of corn per square meter. According to this calculation, how many tons of corn can be harvested in this cornfield?
农民伯伯种的两公顷玉米喜获丰收，平均每平方米收玉米9000克．照这样计算，这块玉米地一共可以收玉米多少吨？
<gadget id="calculator">9_000 / 1_000_000</gadget>
<output>9/1_000 = around 0.009</output>

<gadget id="calculator">2_000 * (9/1_000)</gadget>
<output>18</output>

<result>18</result>