A and B produced a total of 450 parts, and the number of parts produced by A was 1.5 times that of B. How many parts did B produce?
甲、乙两人共生产零件450个，其中甲生产的零件个数是乙的1.5倍，乙生产零件多少个？
<gadget id="calculator">1 + 1.5</gadget>
<output>2.5</output>

<gadget id="calculator">450 / 2.5</gadget>
<output>180</output>

<result>180</result>