The farm needs to harvest 1,320 hectares of wheat, and 480 hectares were harvested in the first 4 days. At this rate, how many days will it take to harvest? (Solve with ratio)
农场要收割小麦1320公顷，前4天收割了480公顷，照这样的速度，还要多少天才能收割完？(用比例解)
<gadget id="calculator">1_320 - 480</gadget>
<output>840</output>

<gadget id="calculator">480 / 4</gadget>
<output>120</output>

<gadget id="calculator">840 / 120</gadget>
<output>7</output>

<result>7</result>