A vegetable field has a total of 1.8 hectares. (1/3) of it is planted with green vegetables, and the rest are planted with radishes and spinach. The area ratio of radishes and spinach is 2:1. How many hectares are planted with radishes?
一块菜地共1.8公顷，它的(1/3)种青菜，其余的种萝卜和菠菜，种萝卜和菠菜的面积比为2：1，则种萝卜多少公顷．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1.8 * (2/3) * (2/3)</gadget>
<output>0.8</output>

<result>0.8</result>