There are 50 people in Class 51, and the number of boys is 1.5 times that of girls. How many boys are there?
五1班有50人，其中男生人数是女生的1.5倍，男生有多少人？
<gadget id="calculator">1.5 + 1</gadget>
<output>2.5</output>

<gadget id="calculator">50 / 2.5</gadget>
<output>20</output>

<gadget id="calculator">20 * 1.5</gadget>
<output>30</output>

<result>30</result>