There are 720 ping-pong balls in the sports store, every 6 ping-pong balls are packed in a box, 98 boxes are sold, how many boxes are left?
体育商店有720个乒乓球，每6个乒乓球装1盒，卖出98盒，还剩多少盒？
<gadget id="calculator">720 / 6</gadget>
<output>120</output>

<gadget id="calculator">120 - 98</gadget>
<output>22</output>

<result>22</result>