The mother's weight is 55 kg, which is exactly (11/12) of the father's weight, and Xiao Gang's weight is exactly 50% of his father's weight. How many kilograms does Xiao Gang weigh?
妈妈的体重是55千克，恰好是爸爸体重的(11/12)，小刚的体重正好是爸爸的50%，小刚的体重是多少千克？
<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">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

<result>30</result>