A monkey weighs 4 kg. The mass of a monkey is equal to the mass of 2 rabbits. The mass of 2 rabbits is equal to the mass of 4 kittens. What is the total weight of a rabbit and a kitten?
1只小猴重4千克，1只小猴的质量等于2只小兔的质量，2只小兔的质量等于4只小猫的质量，1只小兔和1只小猫共重多少千克．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">4 / 4</gadget>
<output>1</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<result>3</result>