When X=3, Y=1.5, what is the value of 6X+4Y
当X=3，Y=1.5时，6X+4Y的值是多少
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">4 * 1.5</gadget>
<output>6</output>

<gadget id="calculator">18 + 6</gadget>
<output>24</output>

<result>24</result>