pesticide is mixed with water to make a pesticide solution, and the ratio of pesticide to water is (1/150). How many kilograms of water should be used to mix 4 kilograms of pesticides?
某杀虫剂和水混合配成杀虫药水，杀虫剂与水的比值是(1/150)．现有4千克杀虫剂，需要用多少千克水混合？
<gadget id="calculator">1 / 150</gadget>
<output>1/150 = around 0.006667</output>

<gadget id="calculator">4 / (1/150)</gadget>
<output>600</output>

<result>600</result>