Warehouse A stores 128 tons of grain, and Warehouse B stores 52 tons of grain. Warehouse A ships out 12 tons every day, and Warehouse B brings in 7 tons every day. After how many days, the two warehouses store the same amount of grain.
甲仓存粮128吨，乙仓存粮52吨，甲仓每天运出12吨，乙仓每天运进7吨，多少天后两仓存粮同样多．
<gadget id="calculator">128 - 52</gadget>
<output>76</output>

<gadget id="calculator">7 + 12</gadget>
<output>19</output>

<gadget id="calculator">76 / 19</gadget>
<output>4</output>

<result>4</result>