Our school has 4 classes in the third grade, 3 classes in the fourth grade, and 43 students in each class in the third grade. There are 46 students in each class of fourth grade. How many students are there in the third and fourth grades?
我校三年级有4个班，四年级有3个班，三年级每班43人．四年级每班46人．三年级和四年级一共有多少人？
<gadget id="calculator">43 * 3</gadget>
<output>129</output>

<gadget id="calculator">46 * 4</gadget>
<output>184</output>

<gadget id="calculator">129 + 184</gadget>
<output>313</output>

<result>313</result>