There are 47 kilograms of candies, 3.5 kilograms are sold, and the rest are packed in a box of 2.9 kilograms. How many boxes can be filled?
有47千克糖果，卖出了3.5千克，剩下的每2.9千克装一盒，可以装多少盒？
<gadget id="calculator">47 - 3.5</gadget>
<output>43.5</output>

<gadget id="calculator">43.5 / 2.9</gadget>
<output>15</output>

<result>15</result>