There are 52 table tennis balls in total, 10 of them are packed in a box, and there are 2 left after packing. How many boxes were there in total? (column equation solution)
一共有52个乒乓球，每10个装一盒，装完后还剩2个．一共装了多少盒？(列方程解答)
<gadget id="calculator">52 - 2</gadget>
<output>50</output>

<gadget id="calculator">50 / 10</gadget>
<output>5</output>

<result>5</result>