Chunlei Primary School organized students to visit the Science and Technology Museum. The fourth grade went to 228 people, and the number of third graders was half of the fourth graders. How many people went to the third and fourth grades?
春蕾小学组织同学们到科技馆参观．四年级去了228人，三年级去的人数是四年级的一半．三、四年级一共去了多少人？
<gadget id="calculator">228 / 2</gadget>
<output>114</output>

<gadget id="calculator">114 + 228</gadget>
<output>342</output>

<result>342</result>