A farm used a combine harvester to harvest wheat, and harvested 9.6 hectares in 6 hours. According to this calculation, it will take 4 hours to harvest. How many hectares are unharvested?
某农场用一台联合收割机收割小麦，6小时收割了9.6公顷．照这样计算，还要4小时收割完．这有多少公顷没有收割？
<gadget id="calculator">9.6 * 4</gadget>
<output>38.4</output>

<gadget id="calculator">38.4 / 6</gadget>
<output>6.4</output>

<result>6.4</result>