The students went to visit the Science and Technology Museum, 45 students in the fourth grade, and 12 students in the fifth grade were 3 times more than the fourth grade. How many people went to the two grades?
同学们去参观科技馆，四年级去了45人，五年级去的人数比四年级的3倍多12人．两个年级一共去了多少人？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">135 + 12</gadget>
<output>147</output>

<gadget id="calculator">147 + 45</gadget>
<output>192</output>

<result>192</result>