Prepare a pesticide in which the ratio of powder to water is 3:1000. Now there are 1.5 kilograms of this kind of powder, how many kilograms of this kind of pesticide can be prepared?
配制一种农药，其中药粉与水质量的比是3：1000．现在有这种药粉1.5千克，可以配制这种农药多少千克？
<gadget id="calculator">3 / 1_003</gadget>
<output>3/1_003 = around 0.002991</output>

<gadget id="calculator">1.5 / (3/1_003)</gadget>
<output>501.5</output>

<result>501.5</result>