When x=4, y=5, z=6, what is the value of xy+z
当x=4，y=5，z=6时，xy+z的值是多少
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 6</gadget>
<output>26</output>

<result>26</result>