Master Wang has produced 64 parts, each of which is packed in a box of 6, and 8 boxes have been packed, how many are left unpacked?
王师傅生产了64个零件，每6个装一盒，已经装了8盒，还剩下多少个没有装？
<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<gadget id="calculator">64 - 48</gadget>
<output>16</output>

<result>16</result>