There are 405 boxes of chocolates in the "Loving Home" supermarket, each box has 6 packs, and 256 packs are sold, how many packs are left?
"爱家"超市有405盒巧克力，每盒有6包，卖出256包，还剩多少包？
<gadget id="calculator">405 * 6</gadget>
<output>2_430</output>

<gadget id="calculator">2_430 - 256</gadget>
<output>2_174</output>

<result>2_174</result>