Dongdong's weight is 34.5 kg, his cousin's weight is half of his, and his grandfather's weight is 4 times that of his cousin. How many kilograms does grandpa weigh?
冬冬体重34.5千克，表弟体重是他的一半，而爷爷体重是表弟的4倍．爷爷体重是多少千克？
<gadget id="calculator">34.5 / 2</gadget>
<output>17.25</output>

<gadget id="calculator">17.25 * 4</gadget>
<output>69</output>

<result>69</result>