To prepare a potion for vegetable fields, the mass ratio of pesticide to water is 1:300, and the existing pesticide is 1.5kg, how many kilograms of potion can be prepared?
配制一种菜地用的药水，农药与水的质量比是1：300，现有农药1.5kg，可以配制药水多少千克？
<gadget id="calculator">1 + 300</gadget>
<output>301</output>

<gadget id="calculator">1 / 301</gadget>
<output>1/301 = around 0.003322</output>

<gadget id="calculator">1.5 / (1/301)</gadget>
<output>451.5</output>

<result>451.5</result>