The third grade planted 178 trees, and the fourth grade planted 16 trees three times more than the third grade. How many trees does the fourth grade plant?
三年级种树178棵，四年级比三年级种树的3倍还多16棵．四年级种树多少棵？
<gadget id="calculator">178 * 3</gadget>
<output>534</output>

<gadget id="calculator">534 + 16</gadget>
<output>550</output>

<result>550</result>