A pack of sunflower seeds is 160 grams, and the price is 3.2 yuan. How much is it per kilogram of sunflower seeds? (answer in two ways)
一包葵瓜子160克，售价3.2元，每千克葵瓜子是多少元？(用两种方法解答)
<gadget id="calculator">160 / 1_000</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">3.2 / (4/25)</gadget>
<output>20</output>

<result>20</result>