1kg of a certain pesticide diluted with water can spray (2/3) hectares of vegetable fields, how many kg of pesticides are needed to spray (1/5) hectares of vegetable fields.
某种1kg的农药加水稀释后可喷洒(2/3)公顷的菜地，喷洒(1/5)公顷菜地需要农药多少kg．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / (2/3)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/2) * (1/5)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>