Xiao Gang's weight is 27 kg. Dad's weight is 3 times that of Xiaogang. How many kilograms does dad weigh?
小刚的体重是27千克．爸爸的体重是小刚的3倍．爸爸的体重是多少千克？
<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<result>81</result>