A fruit store originally had 150 kilograms of oranges, and sold 6 baskets, each basket a kilogram, how many kilograms of oranges are left in this fruit store.
一个水果店，原有桔子150千克，卖出6筐，每筐a千克，这个水果店还剩桔子多少千克．
<gadget id="calculator">150 - 6</gadget>
<output>144</output>

<result>144</result>