When it is known that a=8 and b=9, what is the value of 3a+2b
已知a=8，b=9时，3a+2b的值是多少
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<gadget id="calculator">24 + 18</gadget>
<output>42</output>

<result>42</result>