Nanhu Primary School bought back 25 boxes of chalk, 28 boxes in each box, after using up 358 boxes, how many boxes are left?
南湖小学买回25箱粉笔，每箱28盒，用去358盒后，还剩多少盒？
<gadget id="calculator">25 * 28</gadget>
<output>700</output>

<gadget id="calculator">700 - 358</gadget>
<output>342</output>

<result>342</result>