There are 120 boys and 3 times as many girls as boys. How many boys and girls are there?
男生有120人，女生是男生的3倍，男女生共有多少人？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">360 + 120</gadget>
<output>480</output>

<result>480</result>