Mom's weight is 55 kg. Xiaohong's weight is her mother's (9/11) and her father's weight (1/2). How much is her father's weight in kilograms?
妈妈的体重55千克，小红的体重是妈妈的(9/11)，又是爸爸体重的(1/2)，爸爸的体重是多少千克？
<gadget id="calculator">9 / 11</gadget>
<output>9/11 = around 0.818182</output>

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

<gadget id="calculator">(9/11) / (1/2)</gadget>
<output>18/11 = around 1.636364</output>

<gadget id="calculator">55 * (18/11)</gadget>
<output>90</output>

<result>90</result>