There are 40 to 50 apples in a basket, if 3 apples can be filled in a tray, and 5 apples can be filled in a tray, how many apples are there in this basket?
有一筐苹果在40～50个之间，如果3个一盘能刚好装完，5个一盘也能刚好装完，这筐苹果有多少个？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>