The fruit shop sold 150 kilograms of bananas, oranges and pineapples on Sunday, of which 27.5 kilograms were bananas, and the quantity of oranges sold was 3.6 times that of bananas. How many kilograms of pineapples did the fruit shop sell on Sunday?
水果店星期天卖出香蕉、桔子和菠萝三种水果一共150千克，其中香蕉27.5千克，卖出的桔子的数量是香蕉的3.6倍．水果店星期天卖出菠萝多少千克？
<gadget id="calculator">27.5 * 3.6</gadget>
<output>99</output>

<gadget id="calculator">150 - 99 - 27.5</gadget>
<output>23.5</output>

<result>23.5</result>