The fruit store shipped 180 kilograms of pears. If each box contains 30 kilograms, there are still 2 boxes missing. How many boxes did the fruit store have in total?
水果店运来180千克梨，如果每箱装30千克，还少2个箱子，水果店原来共有多少个箱子？
<gadget id="calculator">180 / 30</gadget>
<output>6</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<result>4</result>