Dad weighs 80 kilograms, mother's weight is father's (3/5), Xiaoming's weight is mother's (1/2), how much is Xiaoming's weight in kilograms?
爸爸重80千克，妈妈的体重是爸爸的(3/5)，小明的体重是妈妈的(1/2)，小明体重是多少千克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">80 * (3/5) * (1/2)</gadget>
<output>24</output>

<result>24</result>