The unit price of footballs in the store is 1.5 times that of basketballs. Xiao Ming bought a football and 3 basketballs and paid a total of 180 yuan. How much is a basketball?
商店里足球单价是篮球的1.5倍，小明买了一个足球和3个篮球共付180元，一个篮球多少元？
<gadget id="calculator">3 + 1.5</gadget>
<output>4.5</output>

<gadget id="calculator">180 / 4.5</gadget>
<output>40</output>

<result>40</result>