A potion for spraying rice, the mass ratio of pesticide to water is 1:120, now there are 3 kg of pesticide, how many kg of water should be added?
一种喷洒水稻的药水，农药与水的质量比是1：120，现在有3千克农药，要加水多少千克？
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 120</gadget>
<output>360</output>

<result>360</result>