A potion for spraying fruit trees. The mass ratio of pesticide to water is 1:150. If there are 2 kg of pesticide, how many kg of water should be added?
一种喷洒果树的药水，农药和水的质量比是1：150，现有2千克农药，需要加多少千克的水？
<gadget id="calculator">1 / 150</gadget>
<output>1/150 = around 0.006667</output>

<gadget id="calculator">2 / (1/150)</gadget>
<output>300</output>

<result>300</result>