The weight of grandpa is 55 kg, which is (11/12) of father's weight, and the weight of naughty is exactly (1/2) of father's weight. How much is naughty's weight in kilograms?
爷爷的体重是55千克，是爸爸体重的(11/12)，淘气的体重正好是爸爸体重的(1/2)，淘气的体重是多少千克？
<gadget id="calculator">11 / 12</gadget>
<output>11/12 = around 0.916667</output>

<gadget id="calculator">55 / (11/12)</gadget>
<output>60</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 * (1/2)</gadget>
<output>30</output>

<result>30</result>