A packaging workshop needs to pack 726 pairs of leather shoes, and 285 pairs have already been packed. If the rest pack 49 pairs per hour, how many hours will it take to finish packing?
某包装车间要包装726双皮鞋，已经包装了285双，剩下的如果每小时包装49双，还要做几小时才能包装完？
<gadget id="calculator">726 - 285</gadget>
<output>441</output>

<gadget id="calculator">441 / 49</gadget>
<output>9</output>

<result>9</result>