The younger brother weighs 30 kilograms, and the older brother's weight is 6 kilograms less than twice that of the younger brother. How much does the older brother weigh?
弟弟体重30千克，哥哥的体重比弟弟的2倍少6千克，哥哥有多重？
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">60 - 6</gadget>
<output>54</output>

<result>54</result>