There are 18 girls in Class 1 of the third grade in Yucai Primary School, and the number of boys is three times that of girls. How many boys and girls are there in total?
育才小学三年级一班有女生18人，男生人数是女生的3倍，男生和女生一共多少人．
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">54 + 18</gadget>
<output>72</output>

<result>72</result>