Mother's weight is 60 kg, which is exactly (2/3) of father's weight, and Xiao Ming's weight is father's (2/9), how much is Xiao Ming's weight in kilograms?
妈妈的体重60千克，恰好是爸爸体重的(2/3)，小明体重是爸爸的(2/9)，小明的体重是多少千克？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (2/3)</gadget>
<output>90</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">90 * (2/9)</gadget>
<output>20</output>

<result>20</result>